i’d recommend yunohost over cpanel

Should be fine. You may want to follow a guide on installing docker so it doesn’t conflict with whatever firewall cpanel uses.

Short answer: you can’t be because Lemmy and cPanel are based on different software architectures.

Long answer: First, as far as I know cPanel can only deploy PHP app, which most open source forums are. Lemmy is written in Rust and is executed differently to generate a website. Second, Lemmy has its own server that connects to the web host’s server in a process called reverse proxying, and it does this by having a main “Lemmy” program constantly running as long as the site is live, just like the web server it connects to. This works very differently from PHP, where each webpage is a separate very small program that runs when the page is called, and then exits when the page render is complete.