Notes on setting up a full node on Raspberry Pi 5 with stratum server
I have a video that covers the topic on YouTube.
I forgot to mention in my video and on the PDF file that if you are not just using TOR, you need to configure your firewall on your router to port forward 8333 to your Pi. If you don't do that, you won't really have a reachable node.
Another thing to do is check out bitnodes.io. You can test your node's connection with their tool.