guides for unmanaged server installs?

Anyone got any good guides for fresh setup of unmanaged server?

I know my way around installing stuff but I've never done it from step 1 (just centos 8 is up there), and I don't want to leave some gigantic security hole because I forgot something important...

Sorry if this is in the wrong forum

Digitalocean has great in-depth tutorial on this.

Just check them website.