Hey thanks for answering. This is just for a test/learning exercise, but
I just registered tarvis.online and was going to do :
laptop.tarvis.online -> 192.168.82.25
server.tarvis.online -> 192.168.82.30 (also has a public IP)
The CNAME trick seemed promising, but the UI at my registrar is pretty broken right now. I should just change name servers 