Multiple questions about college stuff, strictly to be answered by people who know what they're talking about!

May I suggest that you limit your questions to one topic at a time? Few people have the patience to read 6 questions and you have no business burdening them with that task. As for your mother being a bad parent, at 21 the responsibility for education lays on your shoulders, not hers. And you have flitted away three years without any accomplishment, Just what motivation do you need? The rest of your life is in your hands and you have to decide the course you will take.