What type of bus did you get? If it's a front engine model, it will drive just like a large rental moving truck...just a bit longer. If it's a rear engine model, that's where things feel much different. In most rear engine versions, the driver sits in front of the steer wheels which creates an odd sensation that you're too far forward in turns...so new drivers tend to turn too early and run the rear wheels over the curb.
General tips and advice for new drivers:
Set up your curved mirrors so you can see the lanes on either side of you and just a smidge of the bus...in other words, out quite a ways. Position the flat mirrors pointed down more than you would in a car, hopefully so that you can see the side of your rear wheel. Watch the mirrors during your turns (both sides...you'll be turning your head and leaning a lot!). In a sharp right turn (like from a driveway or at an intersection), pull forward straight farther than feels normal...especially in a rear-engine bus...look at the right mirror and don't turn until the rear wheel reaches the point you want to turn around (that's your pivot point)...then steer sharply all the way to the right...check the side mirrors...make sure you don't run over the curb or the mailbox or the pedestrian on the right...and (very importantly!) also check the left mirror because the ass end of the bus will swing to the left when you turn and you don't want to take out a car in the left lane. In any turn, the rear wheels will follow a track inside the path of the front wheels - remember this all the time and watch for it. The bus driver instructors like to teach "rocking and rolling", which means the driver should (and will) always be leaning forwards and back and looking side to side to check mirrors and clearances on both sides. Even in a left turn at an intersection, it's better to pull straight forward into the intersection then turn instead of making a long sweeping turn.
As Rwnielsen said, allow extra room and learn about air brakes if you have those. Air brakes are great, but they have some quirks. First, watch some safety videos on how to check the air brake system before you drive. While driving, keep in mind that air brakes respond just a fraction of a second slower than hydraulic brakes. Don't ever pump air brakes...you can lose air pressure faster than the system can recover.
Think ahead and don't get into a situation where you cannot turn around or back out comfortably. Think really big ass bus all the time! And while doing so, you'll be smiling and having a blast...enjoy!