How I used Tailscale to join two separate home networks into a single one

Hi everyone! I recently did a small project for myself where I joined together my home network and home network at my parents house where I spend a lot of time. I basically wanted the devices in both networks to be able to talk to each other as if they were in a single network.

I am in no way a specialist when it comes to networking, so please let me know if there is something I missed here or could do better