Hi, looking for some advice to set up a VPN server to get into my home network when traveling.

I have a NAS and an openWRT AP within the network. My router is provided by the ISP and with a built-in VPN. Being a hobbyist in networking, I would like to tab your brains for suggestions and know how:

Should I get my own router to run a wireguard VPN off the router directly, i.e. on the edge of the network, OR run a VPN service off the openWRT AP or the NAS, i.e. from within the home network?

Thanks a lot for your help!