I’ve respoked a few wheels over the years and taught myself to do it by trial and error. It’s not that hard but you do need to take your time and approach it logically.
Take lots of ‘before’ pictures so you can remember how the spoke arrangement went before you took it all apart and as TG says measure the hub to rim offset (if any). I made a wooden stand to support the hub and you can use the side arms to measure the run out. It’ll take 3-4 hrs to do it but lay off the  until you’ve finished
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