First, don't take this the wrong way, but making drastic decisions like this is a very big sign of depression. Consider talking to someone if you feel this may be true.
I think your questions have pretty much been answered, but I'd like to second that investing in speculation might not be the smartest move right now. Come up with a long term plan and a short term plan. For example, try to flip 10 two word .com's for 10% profit each month for the next year, all while using the profits to buy a few medium quality investments. Since you're going to have a lot of free time now, set aside some time to pour through the droplists and read through sales reports to get a feel for what's selling.
Lastly, don't domain on your parents' dime if they still think they're paying for college!
Good luck!