Few years but looking to learn more. Building a lab

Hello. I picked up a few extra mini pcs and I want to install proxmox on both and set them up as red team v blue. I also have 3 routers. 1x net gear 54g old 2000s router. 1x from 2010s and 1x newer from 2020s. My idea is to have blue team to have the different routers setup a stack of different se