Been with https://www.seedhost.eu/ for a while. They’re very competitive and everything works as you would expect.

Jellyfin offers HTTPS, you just need to specify a certificate. It’s going to be a lot easier to just setup a web server like nginx and expose that to the internet, probably via port forwarding on your gateway/router. In that case, you can get a free certificate from letsencrypt.

So, the basic steps are:

0. Get a domain name
1. Setup JF server, ensure it works locally
2. Install a web server and set it up to proxy traffic to JF
3. Expose the web server ports 80 and 443 to the internet
4. Setup letsencrypt with automatic renewal

This might sound like a lot of work, but at least you own your data and service. Plex can and will block accounts, rendering servers basically useless.