hah, understandable. At least you were working on this stuff in high school. Don't be embarrassed of any of that work even if it's not great in hind sight. My parents had no tools and I didn't build anything back then. I was out camping with friends a lot in highschool (2002-2006) and we would take my 2wd drive ranger and camp off fire roads literally 15 minutes from the Rubicon trail and had no idea what a cool scene and era we were missing out on back then... Anyways... lol
Rear leaf hangers can be made or are cheap to buy. Maybe a good project if waiting for funds since the engine rebuild/swap isn't necessarily cheap. A lot of people get hung up on shackle angle when setting their spring hangers, but I think that's an incorrect measure.
Flat length of the spring minus shackle length = the spring eye to spring hanger length.
That physically gives the system range of motion to not bind up when the springs flatten. Shackle angle will naturally present itself given the spring stiffness and the load of the truck on the spring.