The way to do it easy is to make sure all the spokes are the same threaded into the nipples.
If you look at the inside and the spokes are the right length, the spokes will come flush to the slot
Make sure they are all the same and the wheel will be close to true. Then start at the valve stem
hole and tighten them all the same. Like maybe a 1/2 turn . Go all around and then check the tightness.
If they are still loose then do it the same all around again. Once they are tight , you may have a slight
bobble in a couple spots you can adjust that out.