[Solved with Gluetun] Tailscale ExitNode with VPN

I would really really really like to have one device on my tailnet as the exitnode for all other devices on the tailnet. However, most VPNs make this really difficult. Is there any way to do this? I’ve read it’s possible with split-tunnelling, but ProtonVPN (which I use) doesn’t support that. I just installed Alpine Linux...