My advice to new riders-
Ride unlicensed, you'll probably get away with it if you stay off main roads.
Most 250cc bikes have very little power and if you buy one you'll have to spend money upgrading to a proper bike in month. At least get a 600cc sportsbike, if not a litre, so you won't have to waste money upgrading straight away. Don't worry about horror stories people will tell you about sportsbikes, they only go as fast as you twist your wrist, and a 600cc engine is only a third of the size of the engine in a corolla, weak as piss.
Wearing a jacket and pants is torture in the summer heat, and leathers make you look like a fag. If you collide with a truck leathers aren't going to do shit, your main defense on a bike is your reaction skills, so you want to be comfortable so you're focusing on the road, not how much of a pain your new leathers are. T-shirt and thongs will keep you cool and collected.