It's definitely feasible, though it'll be more of an uphill battle. (I say this as someone who also has less 'refined' artwork.)
First of all, are you sure that a comic is the perfect medium? As @VibrantFox has said, you could also attempt writing.
If you are dead set on a comic, however, there's nothing wrong with putting in your all and improving your art over time. A comic is a great way to get better, and there will certainly be people who will gravitate to your work if the characters and story are good enough. (Just take a look at the success of ONE for an example of this.)
Best of luck, and I look forward to seeing your work!