Guys, I never intended for this to spiral into a flame war. My thanks to those who gave me useful answers that I can ponder about.
Well, I'm going ahead with the whole process. I bought all my gear and I'm ready to take the safety course. I told my mother so she knows what I'm thinking of doing, and she knows that I'd go ahead even if she doesn't approve. I understand now that she will never approve of my decision and she will never be able to provide me with the support I seek, but I can live with that. I'm not seeking any sort of acceptance from her; I just want her to understand my decision and ease her into coping with the choices I've made. At least now she knows where I'm at, rather than having to receive a call one day telling her that her son was in a serious motorcycle accident.
On a lighter note, I'm likely going to be purchasing a bike in the next week or so. I'm thinking of just leaving my bike near where I live. I'm not sure if I should go visit my mom with a motorcycle or just take transit. That's a question for another day. Anyway, I'm pretty excited about this!
One final note, I can't understand the reasoning behind those who say "move out and f' the world". I may be young (23), but I've been financially independent of my family since going to university (thanks to my co-op placements). Just because I have the money and freedom (and apparently immortality) to do whatever I want does not mean I should f' the world. When I'm dead, I won't care because I won't know it. The people around me will have to deal with the steaming pile of crap that I've left behind, and as a mature person who care about those who love me, I don't want them to get hurt. Don't be selfish and only think about what YOU want to do and ignore other people's feelings. The world does not revolve around you.