I was now able to connect my two private computers by adding a second node in the cloud. According to this thread: How to setup V1 Relay in the new config there need to be two nodes in order for the relay service in the cloud to start so that other nodes can use a p2p-circuit.
However, I am still not able to publish messages on one of my private computers and receive them on my other private computer, without having at least one of the cloud nodes being subscribed to the topic aswell. If any of the cloud nodes is subscribed to the topic, my other private computer receives the messages, if non of the cloud nodes are subscribed, my private computer does not receive any messages.
Any ideas how I can receive messages on my private computers without having cloud nodes that are subscribed to the topic? Thank you!