Questions about home network setuo

Provider: Xfinity

I’m trying to understand the network setup so I can use my home network while abroad

Help me make sense of the setup

So Brume 2 would stay at home

Then I’d get another router that I’d take with me to travel with

Am I missing anything? And I’d need a vpn like wireguard that binds to my Brume 2? I have private internet access vpn which I think also has wireguard

Please advise

Thanks