Briar is probably the best bet if we want something that works despite any governmental effort to break encrypted messaging.
I never really used it (I don’t have anyone around it interested to try it with me :'( ) but I would be interested to hear more about it if anyone has experience with it.
I’m using OVH for the domain name and they offer a free 100mb hosting and one email address with every domain name. It can be a good option to start of you are planning to have a very light static website.
Synology also has a functional Linux client.