Welcome to the AA community!
If you live near a larger city you can usually find a sand blasting sand supplier. They frequently work with individuals looking for sand. There are many colors, including natural ones. It is difficult to keep sand that light color clean with plants.
You can be cycling the tank with out having sand in it if you still have a filter for it and use API Bio-Chem Stars in the filter, and can add the canister filter when you can afford it. You would be able to move the Bio-Stars over to the canister filter when you get it.