no it is not very efficent to drive a truck to and from school
No, it is probably very inefficient.
A truck driving school teaches you how to drive eighteen wheelers. Not only do they teach you drive these large trucks, but they teach you the many laws you must follow as you are driving cross country or within you own state.
You go to an actual truck driving school.
Go to a truck driving school. You're not going to learn how to drive a Class 8 truck by reading about it on this website.
You go to a truck driving school and learn how to drive a truck.
Truck driving school and some follow-on training.
I don't think there is a law against it--as long as both you and the truck are licensed.
Someone who knows how to drive a truck and is legally licensed to drive a truck has to train you, so that you can drive a truck (but you do also have to get a license).
You should get around a large truck and stay in front of it if possible because it blocks your vision. Driving right beside a large truck puts you in it's drivers blind spot.
They have large blind spots to the rear and on the sides.