You are in the right place.
As a new comic artist, you will need to create something that the masses of viewers and buyers want.
Raunchy Sex ( the more the better) Kink, including Bondage, and Women in Peril, Futa or Dick Girl art garnish a lot of the sales here.
For myself personally, I always have money coming to me at the end of the month. Some months are better than others but remember I have a huge amount of material in the Renderotica store that has been posted for over 15 years
Send some content to the store for consideration when you are ready. They will give you some basic guidelines to follow as to what is allowed and how many pages you need to submit. When you are ready, they will send you a PDF for uploading that must be followed to the letter. This includes the KB dimensions of your thumbnails Cover art and Samples, plus how large they can be
Graphic comics do well here and Series of images without text also do well some of these are cover to cover sex and more sex where the picture simple says it all. As for me, I like to tell a story using text that must be free of typo's to the best of your ability, A few can slip by the store editors but too many and you will be told to correct them. Trust me I know. My spouse is an English major and proofs all my work, once when she was ill I tried to post a story without her looking it over, and the comic got tossed back at me, Try as I did to make sure I had my spelling spot on, I had over a dozen typo's . So have a trusted friend, girlfriend or spouse, look over your work and point out typo's and when they are done fix them and then re-read your comic again as they might mix something.
Software. If you are going to do actual graphic comic stories, I would pick up a copy of Comic Life. It's downright cheap and it has a decent spellchecking library.
Create a Cover that will draw someones attention, and several samples so the buyers can get a taste of what will be between the covers and for your first comic, keep the price modest My first comic was $8 but now I base prices on page content
Don't expect to get rich... but if your work is good enough to garnish a bunch of sales, it will be an indicator that you are doing something right and with more comics going into the store, you might get some extra change in your pocket.
Best of luck to you
Regards Shadoman
PS feel free to check out my store www.renderotica.com/content-artists/shadoman/371 for Cover art and samples
and those of fellow artist Captain Trips, Blackadder , hibbli3D, Gonzo and others
Who knows what lurks in the hearts of perverted artist....
The Shado Knows