Hey! I know what you mean. I'm a leftie too and that has always been sort of a problem.
The "Alt" key is not bound to any keys; it just modifies the behaviour of several tools, shortcuts, etc. So unfortunately you can't change it.
I don't know if you're allowed to use a tablet where ou are (I'd be surprised, but I still don't know
), but if you can, turn it over to the left-handed position and assign one of the buttons on your tablet to the Alt key to make your life easier.
It's not much of a solution, and you probably already tried that, but if you hadn't, there it is!
I think you should talk to your istructor about this though
He or she will give you the best answer!
Hope this helped.