per player storage

i'm trying to rough out the concept for a method of using a datapack and fabric server mod to give finer advancement control, for example reading and acting on the player stats screen, to do this without forcing players on my server to install a mod, i need to communicate data from the mod to a companion datapack, the current plan would be to get the players uuid, do some math to fit it in 16 chars, and make a scoreboard objective out of it to store the info i need to move from mod to datapack. is this at all possible with datapack functionality? is reading it going to be a huge pain?