Hey

I don't have a bike yet but I'm really excited to get one.  I've been riding dirtbikes since I was about 5 and thought it was time.  I just need to know what should I learn before buying a bike?  And I'm probably buying a used one I need to know what to look out for.  If anyone has any suggestions for some bikes to look at let me know!  It's going to be a while before I get one since I need to get a job in the city and I get my license taken away for 90 days this month.