Re-do your power checks, get your clearance and then enjoy every minute of it.....you'll never go solo ever again in your life. And once you do you've joined the most exclusive club in the world.
An important bit of advice I think is if for any reason you are not happy with your set up on finals by 300ft call a go-around. First solo is not just about landing it but also airmanship......and it will give you time to resettle in the circuit.
Good luck
Jude