All you need is some new spokes, new nipples, and a nipple adjustment tool. The tool really is essential, it’s extremely frustrating to do with a normal wrench. As for a stand to true the wheel on, you can invest in that, but you can also just flip the bike upside down and spin the wheel and true it by eye.

It can also be a little hard to get the tire and tube off the rim if you need to replace any of the nipples, but it should be easy enough if you take the air out of the tube, then jam something under the tire and hold it, and use your finger or another tool to run along the loosened tire until it comes out of the rim, then do the same on the other side.