Also any advice on a good selection of sizes that I'll most likely need would be greatly appreciated as I'm a noob

No there isn't really. I'm part of the bonsai society here, they sell wire at the monthly meetings, but we're not having a meeting until the end of Feb.
I generally get wire (Ali & Copper) from Hugh @ Treemakers | Wire & Supplies. He usually has pretty good selection and does online/delivery