So many things, my kid. I'm a ball of regret.
First, I wouldn't let my parents dictate my future. I'd step up and do whataver the hell I wanted (art, in this case). I should have followed my heart.
Second, I wouldn't have stoped drawing for almost 5~6 years. Depression hit me hard, and I hardly sketched on the notebook at college. Stopping to draw almost killed me.
Third, I'd study more. Anatomy, perspective, I'd study everything cuz I had time and money for that. I'd do courses, I'd do anything possible and impossible to improve my art. Use my time in more productive way. And restart to write fiction (I stopped at my teenage years), as I missed it but never retried it.
As to my comic... I'd study more. Practice more. Mainly backgrounds (hehe). Maybe write and rewrite my comic for a while before posting it but I'm too anxious and wanted to do it already xD Maybe get some friends to review it frist before posting it would be nice too (but i'm too shy to show my work to friends). But I'm fine with how I went through working on it, it was chaotic for inumeral reasons, but what I'd change is basicaly my abilities that are lacking most of the time and practice could change a bit.