Occasionally I see a thread or two that asks for some help with the fundamentals of comic production, distribution and promotion.
So I've pooled together and linked some useful information sources and resources I've come across with regards to the webcomics and print comics industry and it's standards. As well as useful sites for tips on how to promote yourselves as creators.
This is by no means a definitive list, just some things I've personally found, that have been useful with my own projects. if you have anything you'd like to add to the list, you're more than welcome.
Here's the list of resources I've found:
This is a site that contains all the industry standard page sizes for print comics:
This is a site that explains the basics for lettering and comic text and SFX formatting. It's focused on lettering print comics, but a lot of it crosses over to webcomics as well.
http://www.blambot.com/articles_tips.shtml
A blog offering tips and techniques from an industry professional for coloring in comics, it's focus is on print, but it crosses over to web-comics as well:
A resource site for public domain and free to use fonts:
https://www.dafont.com/theme.php?cat=102
A site that offers useful tips on how to promote and spread around your webcomics
A site listing the submissions page for various comic publishers. I don't know if all of these accept webcomics, but image, Lion's forge and boom have printed webcomics before, so they'd be your best bet if that's the path you want to go with.
The creator of the previous site also made this convenient info graphic to go with the list of publishers. It divides them into categories so you can better choose which publisher is best for your project:
A blog offering tips from a creator of a successful comics Kickstarter, while framed through the lens of managing a comics campaign, most of the advice is quite general.
Though by now the article is slightly dated, you may need to read up on more information to understand how the crowdfunding scene has changed. Eg: it's a lot more saturated now then it was in 2011.
A blog run by Patreon on how to manage a fan-base and run a successful Patreon account. These are just two blogs from a series Patreon offers. You should read up on the other's as well, as they offers great advice on just being a freelance artist in general.
I hope this help, if I can think of any more sites, I'll also link them here later.