That explains a lot, actually.
I hope you never give up you training and become way better in a few years, I know you can make it, so long as you keep your practice and don't stop improving and taking notes of artists who have more years of expirience.

I'm going to be honest, I scribbled this in a couple hours at the end of the day right before going to bed.

Also Vanripper's style is way rounder and wider than my style, which is more angular and slim, which I think might have made this look as off as it does.

And to answer your question: About a year, if we're using the point at which I got a tablet as the start of me being an artist.