I second BroomstickPilot,
I took up gliding after my PPL, I wish I'd done it first.
When you're searching for lift, you soon learn to keep the ball in the middle and fly cleanly. Landing gives you same skills you'll need for powered, just that you'll be adjusting height with brake rather than throttle and speed is still controlled by stick.
I've learned to cloud climb with turn and slip, speed and altimeter - if you can do
that with the above instruments a full or even partial panel should be no problem.
UAS is about the best value you'll get so make the most of it.