Welcome to the forum!
First, you'll need to have a series to publish.
So, publish a series and keep a consistent schedule, a realistic date that wouldn't cause you burnout nor stress (A lot of writers and comic artist rather have a buffer before publishing, some have 5 to 10 episodes done ahead before publishing to make sure that it doesn't catch up with what they are already making and won't stress out with deadlines)
Then, once your first episode is out (Because you're series will be available so everyone can see it once you publish said episode) some people may be able to see it.
But that's not only it. Whenever you make a new episode, promote it, be it here in the forum, be it in social media, using hashtags or whatever method that is used on each platform, having these posts public also help, I recommend that if you don't like to use your personal accounts, to make an author / artistic name one where to promote your the link to your series to the public.
Still, don't expect to have thousands of subscribers just because you do those things, remember that you're just starting, and that there are so many people publishing on the platform or even several platforms at once. Everyday, at any hour, all year long.
However is important that you understand why are you exposing your content on the first place.
Do you want to tell a story, do you want fame, validation, or just someone to praise you? Then numbers shouldn't matter nor be an indicator that determines the value of your story. If your story has 60 chapters then good, start with any kind of lenght, is better to have something than nothing, even more if you know you can finish it so later you can move to another project and focus on it properly. Compliments and feedback are good, but don't put yourself down with the number of likes, comments or subscribers.
