Journey into self-hosting

So, I have a rpi4b that’s currently running a VPN for family abroad. I’m just finishing setting up Ubuntu server 24.04LTS(I have limited number of USB sticks, and the largest is only 8gb, so this choice was one of size, I can go into ones I had considered before) on an old laptop. For my small business I’ve also bought a domain for a work email, and eventually a website both are/will be hosted externally as I don’t want to faff about with securing those aspects on my home network. The VPN though, that is currently pointing to no-ip dns service, and I want to migrate that to both the laptop and my own registered domain. What’s best practices here? I do need the VPN to exit through to my network, so that my MiL can watch UK streaming from abroad(TV licence shenanigans).