Don't worry about the confidence. I had the potential to go completely professional but I doubted myself way too much in order to go ahead with it - don't make the same mistake I did. However, I've got the right routine to consistently and efficiently improve my chops, groove and everything else. You're more than welcome to drop me a message and I'd be happy to help out. I'd honestly recommend learning how to play on a Jazz jam and how to sight-read. There's plenty of pros here, nonetheless.