Need help with making loot pools

Hi, Im very new to Mcreate and was wondering is anyone could help with what im trying to do. I simply want make a set of customized chest each with there own loot pool and I want to be able to add modded items (as well would like to be able to add name crafted items if possible) into the loot pools. If anyone has any idea or know how to put me in the right direction id be very grateful thanks~