If you have a domain name setup, I'd recommend using Swag as your gateway. It's a hardened nginx with lots of preconfigured samples that make it feel very plug and play. I got SSL with Let's Encrypt set up in minutes. My next task is adding SSO to my setup.
If you're using docker to run your apps, use a network with only swag on it that can connect via port 80 and 443, and put your other apps on a separate network that isn't public, swag also there and let it do its proxy thing. Run docker rootless, each container with a separate user, secrets fully secured, all that good stuff.