I use them for privacy reasons. They will register the domain name under their company name, you don’t have to give out any data about yourself whatsoever. You can pay anonymously with crypto currencies like Monero. Njalla was actually founded by one of the guys who also founded The Pirate Bay.
Definitely Tailscale
I don’t remember how the search works on Jerboa, as I switched to Thunder. I would just use the Lemmy website to join new communities. On the Lemmy Website you can choose whether you want to search for communities that you subscribed to, local communities and communities from all instances.
Check out !truenas@programming.dev. Pro tip: You can use lemmyverse.net to search for communities across all Lemmy instances.
And they allow you to pay with Monero, truly awesome.
Some Tailscale clients are open-source and you can self-host a Headscale server