Go down to Lowe's or Home Depot and get a little bit of wood.... they both have white pine, and then white or red oak, poplar, ash, cypress... depending on season and locale.
If you're doing, say, mahogany, I'd get some oak. Why? Because the grain depth is similar, and filling it for either mahogany, or ash will be a good lesson.
Doing maple? Get the poplar or pine. (I'd go poplar)
The trick here is to use smooth woods or rough woods, as far as grain goes - to match the experience you'll need to gain in order to do a good finish on your project.
Dont worry too much about color, that can be chosen, modified, and decided for your projects wood. Worry more about the smoothness, finish type, drying time, sanding, final result, those are the skills you'll need to have. Color can wait. You CAN practice some bursting with rattle cans (or spraygun). Its not "that" hard but testing and doing it first is a BIG help.