Bound to be anxious first time on your own with a newly issued PPL.
Start with local flights and you'll find you get a little more ambitious and start going further afield. Even if it means doing some circuit work first to iron out the bumps during the landings !.
Don't leave it too long between flights as this wont help your confidence at all.
Oh and if your on your own - talk to yourself as if you have the instructor next to you - sounds stupid but if you talk out loud I found it helped . It will also get you confident for when you carry your first passenger - they will appreciate a running commentary throughout if not familiar with small aircraft !!
After a while you will wonder why you had any apprehension , go fly and it will become more natural - enjoy.....