I've been seriously learning for about a year and recently decided to join gt. I decided to start at fundamentals 1 just to plug any gaps in technique and knowledge. And even though the lessons are easy (at the moment) I'm finding it really useful and each lesson progresses on a nice learning curve. So I'd say start at the begining and if the lessons are to easy you will wiz through them and it will remind you how far you have come plus you won't miss any thing for fundamentals 2 or one of the branches 😊