Do note LoyceV reply before mine as I think that it's an interesting path to explore if you're willing to. I recommend the second approach (VPS with OpenVPN) and you can follow this[1] guide in order to have it up and running.
How about a VPN with port forwarding (or a cheap VPS with OpenVPN installed)?
Most well regarded VPN providers - such as Mullvad or IVPN - have removed the ability to do port forwarding. Proton still allows it[1] but you have to be a paid subscriber and you also get the port chosen by the program and you have to change it each time you restart the VPN connection. Considering that I personally do not trust other VPN providers, my recommendation would be the second option (VPS with OpenVPN installed).
Generally VPN over VPS is rather slow, and also more expensive with insufficient benefits to the network. Instead of having one hop, data goes through your VPS and then to your computer. Cheap ones are generally quite slow and likely wouldn't have sufficient bandwidth for a very large node. 1TB upload is probably not very sufficient if you have a VPN running through it and nodes connecting to it.
It shouldn't be an issue if you're unable to accept inbound connections. If you want an easy to setup and a free solution, then you can route it through Tor.