It's really easy to make covered buttons, and not as fiddly as you would think. I found the best priced supplies on etsy. I ordered 50 half inch button parts and an assembly tool.
Place fabric right side down over the rubbery, cup part of the tool. Put the button part on top and press a little. Be sure to leave enough fabric around the edges to tuck inside the button shell.
Push button part all the way into rubber cup. Trim excess fabric with scissors.
Use scissor tip or finger to press fabric edges inward.
Place button back onto assembly.
Put plastic part of tool over button back. Make sure fabric edges are still well tucked.
Press! Firm circular pressure, making sure all edges have popped in.
Consider crocheting some button loops.