Howdy, y'all.
So the first thing you'll want is a real IP address. Ask your ISP.
Pro Tip: ask about business internet to your home.
At this point, the work starts. Map out the internal and external address space used by your ISP's router. Make sure you can disable DHCP on the router. Don't be afraid to ask if you don't understand DNS or DHCP or Port Forwarding or Firewall. You'll need to kinda know what those things are.
Set up an internal DNS/DHCP server in a non-conflicting internal address pool. Pi-Hole isn't a bad choice. As much as I hate it, this needs to be a dedicated, physical box cabled to the router.
As you set this all up, write it all down. No, you won't remember. Pencil, paper, physical map with hostnames, IPs, MACs, an obfuscated password table, database user names and database names...
Once you are ready, disable router's DHCP and bring yourn online. Obtain new leases and assign static DHCP leases to key MACs. If you know your MACs, you can do this before bringing hosts online.
We took and old laptop and installed a virtualization server. Lots of RAM and a good SSD go a long way here; even on old hardware. This needs to be cabled to your router. It'll have a static IP and I also like to assign it an entry in the DHCP server pool.
Try and make a container, if you can't then make a VM. Check BIOS of the physical machine and make sure virtualization stuff is enabled.
I like LAMP on Debian.
DHCP a infinite lease to the MAC of your container or VM.
Install some sort of CMS; we went with Joomla. Install a template; we went with Helix. Spend two weeks learning how to write this and make it visible internally.
Forward ports in your router to the IP of the LAMP server. Turn WiFi off on your phone and see if it loads in a web browser by typing in your real IP address. If it loads, forward the address to a few friends and make sure it loads on their networks and devices.
Get a domain name. We got ourn at PorkBun. Delete any default records and make an A record pointed at your IP address.
And that's what TF you are seeing here.