Hi there, Mark and thanks for joining up!
Yes – I’d focus on the beginner tunes first, but one nice thing about how the lessons on this site are set up is that there is a basic melody tutorial for even advanced tunes. So if something catches your ear, you should be able to at least pick up the bare bones of the tune.
The techniques section is a good place to reference, but I’d probably first scroll through some of the waltzes & slow airs and pick one to work on…then build from there.
All the best, and keep us posted!
C