I'm a bus driver!
The job is what you make it, if your a gloomy grumpy person then you will get a hard time from the punters. If your a positive person with good people skills the job is easy!
If you like driving, don't act as if the road is your personal race track and have good spacial awareness you should get on fine.
What area do you live in? I work in and around Bath and Bristol but cover anywhere up to 35 miles away from my local start point. You are restricted to how many hours you can work per day and per week and also the distance you can travel in one journey.
Driving a bus is a lot easier than it looks, just remember you have no rear view mirror only your wing mirrors and using them is a must, for your test you will need to be checking your mirrors every 5 - 8 seconds! as for the length and width of the vehicle that all comes with practice and awareness of the vehicle.
Its a very easy job but your own attitude will determine if you let it be easy or if you make it hard for yourself.