Welcome on-board everyone! Maybe we all soon graduate from this thread with fond memories of under-100-ness! 
Under 100 subs here - the challenges I face are not having enough time to marketing and talking to people on this site. But with my current project, "Sam in New York," which will be a long-running series with lots of episodes which will be updated weekly, I hope to change that~!
My Current Project:
Also on Webtoon: https://www.webtoons.com/en/challenge/sam-in-new-york/list?title_no=501948
Genres: Historical, Slice of Life, Drama, Romance (much later on, though)
Summary: On April 6, 1901, in the maternity ward of a hospital on the Lower East Side of New York City, Samuel Abramov - the one and only child of Lev and Raisa Abramov - is born.
"Sam in New York" follows Sam's life from his elementary school years to his late twenties, as he deals with his overbearing, demanding parents' desire for him to be a lawyer, his burgeoning love for the theatre, and embarks on his unceasing quest for fame, love and acceptance.
My Webtoon short story contest entry:
On Webtoon: https://www.webtoons.com/en/challenge/finding-sam-h/list?title_no=435678
Genres: Slice of Life, Drama, Psychological, Romance
Summary: Sam Abramov's childhood dream was to become an actor. Now a 25 year old law school graduate barely making ends meet as a legal assistant, Sam has long laid to rest his dream of making it big as an actor. He is no longer sure of his future and feels increasingly anxious about his career. However, his life will soon radically change in more ways than one...!
I try not to think about all the numbers and algorithm. I believe If I make a good comic everything will eventually come together. But I am eternally grateful to those that have checked my webcomic and either subscribed, gave a like or commented. Hope you all find my comic enjoyable as well!
I have come to realize that no matter how good of an artist/writer you are, as long as you don't put much effort into marketing/promotion, building a fanbase would be REALLY tough, especially when it comes to webcomics.
Some people tend to expect frequent, high-quality updates from you, which is really difficult to deliver when you are a person who really cares a lot about the quality of your project.
Oh, it’s like that with everything, not just comics.
Edit: I decided to post previews for my potential next project on Sundays. I still need to pick a day to skip during the week. Also, kindda started low-key thinking about potential season two if another project doesn’t fly. I really do want a 100 subs project.
Currently i'm at 54 subs!
Tbh I think one of my challenges is being too embarrassed to promote my comic sometimes (LMAO) and finding a schedule that works for me...(drawing comic while doing college .......
)
Anyways! Heres my magical boy manga!
It's LGBT+, Fantasy, Action and Romance! Please check it out if ur interested~
updates every other wednesday! (tomorrow for sure tho-
)
You know, we're still kind of new, but what's helped us out a lot so far is addressing short-comings or challenges and seeing how to solve them or rise above them. That should be the first goal for Tapas folks always. Tapas already does an amazing job of monitoring things for you, views, subscriptions, etc., so work with this valuable info. Do you have a page that didn't get many likes, for instance? Write on your wall and find out what was different about it, get a survey and then answer your comments. Stuff like that.
As far as the subscription challenge goes, that's easy really to get past, but it requires you to do a little hard work too, and that means telling people on social media, other forums, comic sites, link exchanges, wherever you feel you can reach the kind of sites that work best with what your comic offers. For example, one of our webcomics is "Insignificant Otters", and since the comic revolves around otters, we plan to check out some of the most popular forums for otters especially and subscribe and post pages of our comics there. So think about the content you're actually dealing with, and then find your audience that would deal specifically.
One thing we have found helpful is actually interviewing other comic artists, which is a LOT of fun. And since we've both spent the last 20 years or so interviewing all kinds of celebs, this comes naturally for us.
Our only challenge right now is being NEW. But we already have a massive audience from another webcomic we do, a more daring one which we cannot post here, so when we told them we were doing a comic strip, they came running. ^^ So if you already have a built-in audience anywhere, start there for sure. Friends, family, co-workers also, let them know what you're doing, show them what you're doing, and get them to spread word too.
We're Scribes Unlimited and we actually have two webcomics here:
"Insignificant Otters"
https://tapas.io/series/IOtters
"Island Girls"
https://tapas.io/series/Island-Girls
Thanks everyone, and don't worry. If you've got a good webcomic, you can succeed. 
Under 100 and barely reaching 20.
My challenges is marketing the webcomic, building fanbase, and gaining traffic for my webcomic. I use instagram and forums to promote webcomic. I worked on my webcomic on weekdays and already had a large 80-page/11-month buffer which gives me an advantage. I was treating my webcomic as a job or work for me with patreon on my side. I also update consistently. I ran this webcomic since June so it's relatively new. Also being a new webcomic artist who just started and having very small to no social media following is a challenge.
Here's my slice-of-life webcomic, Chion and Kobi. A charming story about a boy and his guinea pig pet in early 2000s Maine town.