it might sound a little cheesy but if i was in your position (Not alot of cash, first grow and i dont know much about growing or even if i like it and can keep anything alive) ...id start with some lettuce. lettuce is nice because it takes hardly any light to grow, finish's in under 50 days and lets you get your feet wet in the horticulture field... pot is a vry forgiving plant, but if u actually want to grow some quality bud with a high yield it takes ALOT of work and the start up cost is rather expensive.

Ether way, no mater what you grow, you learn SO MUCH, those first few grows! Give it a shot! Only thing i rly suggest is Read the forums until you think you no everything about how to grow pot, and then read some more!