mastering the techniques of digital softwares and being a digital artist takes years of trial and error, years of looking at different styles....years of experience, is a long way but in the end it pays off
Keep going and dont give up, we all started the same... I started like that, hell even at 13 years old I wasnt using the internet at all yet... I discovered photoshop when I was 15 years old and the first thing I did when I opened up PS was changing a color image into black and white and at that time I didnt even knew how I made that...I was just pushing buttons.... ( now I know that I was just messing with the alpha channels)
Good luck and dont give up...
I will and hope you have a good one