It sounds like you have a good working base of knowledge to start from and might benefit from some high level concepts. Once you understand the basics you can likely cover what you're looking for with a small open source home router or some other similar hardware.

If you prefer books check out

https://www.amazon.com/Computer-Networking-Top-Down-Approach...

Or for video lectures:

https://www.youtube.com/playlist?list=PLoCMsyE1cvdWKsLVyf6cP...