

(Not an expert) hosting your own instance will make you more identifiable to big tech than if you used a public instance, but it would still increase your privacy compared to giving everything to them, and also prevent you from giving a public instance your data. I currently use “priv.au” but do plan on hosting my own in the near future. Some people who host their own instance even intentionally open it up to the public to crowd source more data points so that their traffic blends in better (not saying I recommend that though).
Tldr: it should still be worth it
In regards to connecting, you should still be able to hop from other vpns to your home network, just keep in mind they you will get higher latency jumping from their VPN network back to yours. I don’t recommend opening it up publicaly just to do that, unless you plan on going all in and having something in front of it like “fail2ban” and Anubis" another option is looking into “tailscale” and if you don’t trust their central server you can selfhost with “head scale” or use a different but adjacent product “pangolin”. These products basically let you creat your our VPN that spans multiple network.
No problem!
I completely know what you mean, it took a lot of research before I felt comfortable enough trusting a public instance enough to use.
So that solution would still decrease their ability to fingerprint you by a lot, but really the big problem would all the people/scripts randomly hammering your ip. They wouldn’t get past your password. But it being public and discoverable would meant you’d constantly be getting hit with a bunch of automation scanning your ports. And the security risk isn’t the concern, it’s more the heavy traffic slowing down your connect from them. It sounds like you’d be fine from a security stand point. But you’d have to put up something to block the traffic.
You could always self host, use that when you’re at home or connected to home through VPN and use it for more personal searches, and then use public instances when you’re connected to other vpns for more general or vague searches. Mixing and matching like that will at least add some noise and make you less identifiable. Kind of best of both worlds.