Hello there, welcome to tapas and the community.
And answering your question :
Sure, why not?
Most of the creators on tapas only making comic and writings as hobby or side job (not all, but a lot), so I guess it is fine to puting your drafts first and telling the reader directly that it is just a draft and will be edited later and that you want a feedback.
I mean, I even put my first comic (sort of, its kind of narration) up months ago and I seriously wasn't able to create the final draft even now because I'm busy with life. ;w;
This one, but no need to check it out if you don't want to. Be sure to read the description if you did want to check it out tho. (Am I promoting this shamelessly? Uh, I guess? Lol)
And I do plan to rewrite (editing and stuff) on one of my 10 chapters stories I put there, so again, if even I can do it with a (sort of) comic, why not your story?
Tapas has a great community and the creators on the forums always supporting and encouraging each other, so just do what you like and happy about. (I actually on wattpad before but I never encountered much toxic reader there)
Good luck with your writings tho. ^^