Better to be naturally good at art than coding. There are a TON of youtube tutorials that walk you through how to code basically anything you can think of, but art? Man, either you have an eye for that or you don't and if you don't no technical tutorial in the world is going to help you get better.
I hope to see some submissions from you soon! Don't worry about ideas, just do the first thing that pops into your head. Don't worry about not being good, the more you do it, the better you get.