Here are a few more hints to help you.
Get some practice in by using store scooters. This will get you use to people being around you. Practice making turns going around the aisles, too. If you have a zoo nearby you can usually rent a
scooter and you can practice for a whole day using a scooter there. Once you get your rental scooter at Disney practice with it at the resort a little. You can use the rental scooter in the resort to get around the grounds and to get to your room but it may require you to get in and out of an elevator getting to your room. Again, you may want someone assisting you from your party for the elevator. We like to back the scooter into the elevator; so, it's easier to get out. We try to get an elevator that is empty. I would advise getting a door stopper for your resort room; so, the door will stay open while you get your scooter in and out of your room. It's safer than someone holding the door for you. You do have to find the sweet spot where the door stopper works best holding the door open.
As far as bus transportation goes a bus driver is not required to takeover and do the scooter for you on and off the bus. Each bus driver is different this way and some will help more than others. Let them know you are a newbie and maybe they will be more considerate and help you. If you have others in your party, you could let them takeover and get the scooter on and off the bus for you if you can get on and off the bus by walking and climbing the stairs on your own accord.
Driving a scooter in a park can be challenging, too. Many get excited at the parks and will dart out in front of you and you need to be very alert not to collide with them and stop if necessary. It can be good to have your group surround you while you are driving your scooter like someone in front of you and to your sides, too.
if you park your scooter outside for a while like eating at a table service restaurant make sure you park the scooter where you are not obstructing an entrance/exit. There is a manual override on the scooter that will allow a Disney cast member to move your scooter if necessary and then it may be difficult to locate it. You can't be in the way of a parade, for example.
Keep an eye on your battery level. You don't want to run out of power. If you need an emergency battery recharge there are outlets in the parks you can use but you have to locate them. Getting around ride queues can be challenging for some. There are some tight turns to deal with getting through ride lines. Again, you may need help from someone in your party to do the scooter for you if you can walk some. You will have to park the scooter and walk some to get to a ride.
In Epcot to do the Soarin' ride you either have to park the scooter on the second floor and walk or take an elevator to get to the ride level.
You need to recharge your scooter battery every night and you need to find a convenient place in your room where you can do it with an available outlet. Some people have had their table removed from their room to make it easier for the scooter to be in the room.
If you