I have played around with yunohost and other similar tools. I know how to open ports on router, configure port forwarding. I am also interested on hosting my own stuff for experiments, but I also have a VPN enabled for privacy reasons on my router at all times. If you haven’t guessed already, I am very reserved on revealing my home IP for selfhosting, as contradictory as it sounds.
I am aware that it’s better to rent a VPS, not to mention the dynamic IP issues, but here it goes: assuming my VPN provider permits port forwarding, is it possible to selfhost anything from behind a VPN, including the virtual machine running all the necessary softwares?
edit: title
edit2: I just realized my VPN provider is discontinuing port forwarding next month. Why?!
Re your vpn question - I have a number of services on my home server, some of which are exposed via reverse proxy (eg. Nextcloud) and others which are only accessible internally or via my wireguard vpn. Setting up a dedicated vpn server on raspberry pi is very simple to do.