What you want is a reverse jumphost in place of PC1.

The jumphost is the internet facing system, and better it be a cheap VPS, these are good for this because it gives you an IP somewhere else.

Since it's only for connectivity it doesn't need hardly any resources, can be a few dollar a month option from a lowendbox deal.

On your actual full node system, you'll use iptables/firewall (ideally a firewall appliance infront of it too) to prevent any connectivity into this system to keep it dark.

The only rule you allow is an outbound rule to the external jumphost from PC2, can be over SSH for simplicity or wireguard if you're so inclined.

End result is your full node at your home looks like it has the VPS IP, and the only traffic that can hit it comes from the jumphost on the port specificed (bitcoin traffic port)

To go a step further, the jumphost could itself have another firewall that only allows traffic to select gossip peers or applications you might use.

Ignore anyone telling you to use Tor, they're just parroting nonsense they read somewhere else: