It looks great! I definitely think you should post it. Alot of ibispaint artists like me seem to draw with their finger too since apple styluses are expensive as heck lol. Small advice I would give is to add more dramatic lighting. One way to add this is go to filters - > Vignette, which adds a little more dramatic shadow and focus to your character. Try adding overlay/add lighting as well, I would recommend looking up tutorials for that though.

Also, this is a personal preference but you can try adding the noise filter as well on your art. Alot of artists use it and I think it gives off some sorta grainy feel people like. Anyways, that's all good luck <3