I'll put in my two cents worth of response to the questions:
It isn't hard to make a good batch of wood shafts. It does require more than a little time and patience, though, and a bit of reading to get started on the process.
You'll need a fletching jig ( which you've already got), a point and nock taper tool, some Duco cement, hot melt glue (or epoxy), and your choice of a sealer for the shafts (oil or water based poly, tung oil, or similar). Stain if you want it. Likewise for cresting (these or of course optional).
Personally, I have found it way easier to get a good flying wood shaft, than a carbon. But carbons end up with high foc easier. Woodies do fine with moderate foc; I easily get good flight with 125grn points.
Spine will be no problem.
I've fletched up several dozen shafts now with tape, do a whole lot of roving in rough woods year round, and don't recall having any problems due to the tape.
Others have offered great advise on length.
Now I am no expert by any means. Shot wood for a few years, tried a couple of sets of carbon, went back to woodies and learned how to make them, this was just a year or two ago. I find it very satisfying to make them, and much prefer shooting them.
Enjoy your journey.