I just googled “plant tissue culture procedure” and there’s like 75 good write ups, most of which are pretty similar. Also, I’m not sure if it’s still out there but I think Fisher has a free interactive mammalian TC lab class which is pretty solid for teaching someone how to work in the hood without being hands on.
Like I said before, 99.9% of the job is keeping stuff clean. You can almost just go through the motions with a piece of dead plant material, and if your agar doesn’t turn into a tube of fuzzy death you’ll pretty much have success (with propagating anyways, I never got near any of these other processes).