Hi Joe
You should get an automated confirmation email that they received your email straight away.
After that it may take a while (some people hear back within a few days, others have to wait a few months, unfortunately.). It depends when and where they holding recruitment days for Bristol. There will probably some in Bristol at some point but sometimes you'll have to travel to London Luton or London Gatwick.
At this time of year easyjet is recruiting a lot for next year so hopefully you shouldn't have to wait for too long!
Good luck,
Dolley