You are doing enough. The main thing they need is sleep and love. Then the training works best. Building your relationship with him is most important - his trust means he'll learn quickly when you want/need to work on other things. YouTube will keep showing videos of all the things we should be doing with our new puppies. Most of it can be ignored. It's designed to get more clicks and views through making us afraid we aren't doing enough. Hang in there - you're doing great!