Download Brother Musson’s guide – brilliant.
I bought a cheapo jig (£30ish)and it’s pretty good to be fair, means you can sit in front of telly with it on the coffee table which is better than messing around using a bike frame/forks but obviously bike frame does the job. Issue with the jig I have is I find the tolerance guides could be more accurate, guess that changes when you spend more dosh.
After the first couple of wheels it gets easier and as said above very addictive.