Look into nginx. See if you can make a basic webpage and access it from a different computer.

You will need to set up port forwarding, or use a VPN that supports it.

Good luck.

Check out !selfhosted@lemmy.world for questions about selhisting, and !lemmy@lemmy.ml for questions about running a Lemmy server

I’d recommend including a lot more details in your post about your machine, your budget, why you want to do it, etc