You should use the reply button, or people won't see your answers.
Maybe you should submit some of your drawings, so we can give concrete critic on your work. It's hard to help you, when we don't even know how good or bad you are.
If I was you, I wouldn't learn from videos! Of course you can watch them to understand how other people work, but speedpaints are okay for that, too. When you want to paint something, paint it from a reference picture or from sitting right in front of it! Watching videos won't make you learn how to paint.
start with "slow and boring" painting first, you need to develop confidence within the software and in your strokesm composition, values, colors first. i'm assuming you are starting from scratch? the speedpainting thing takes alot more knowledge and experience than it looks.