For the site itself the most minimal thng you can do is an html file.

Then some software to act as the “server” that serves that file to a visitor. (nginx, caddy, apache - there are many options).

And your domain needs a domain record which points to your server.

As you want to use a home pc, you need to figure out whether your ISP gives you a dynamic or static IP.

If static, you can just use that.

If dynamic, you’d need some service like dynDNS to keep pointing your domain to your changing IP.