Hi! I've done a bit more thorough googling, because of you I knew what to look for a bit better. I have a wireguard vpn on my fritz box router enabled, which allows me to connect to the vpn from my laptop.
I've read up on how to acces local devices and I found something about adding an IP to the "AllowedIPs" section, but I don't really get which IP I should add.
Thank you for the info! I'll take a look at tailscale and try to wrap my head around the wireguard thing. Thanks for the help!