Well, by 2:30, most of the attorneys, businessmen, etc. are in meetings, and messenger stuff is done for the day. FWIW, in NYC, you see most of the messengers on the streets in the morning.
I hate too rain on your parade, but you have a few things working against you:
1) you are too young
2) you live in a backwater town, one that has zero need for courier service
3) you are not available at the times when messengers are needed
4) you are more interested in doing stunts (such as bunny hops), than actually getting down to work.

Take my advice-get a job at Mc Donalds.