Using a VPS as an SSH Tunnel

Hello,

First of all, I am a newbie, I don't know a lot in networking, so excuse me if I'm dumb at this lol.

I needed a VPS to do SSH Tunneling on the network I'm connected to, the app I'm using for that process is called "HTTP Custom".

After some time I figured out how to listen to SSH on port 443, which was needed in the app I'm using ("HTTP Custom") for that.

The feature I need to use is "SNI (Server name indication)", it requires SSL & Stunnel.

I installed a letsencrypt SSL, but can't figure out the Stunnel part. Can someone help me achieve this?

Or, is there another paid service that offers fast SSH accounts that support Stunnel?

Thanks