Who did you purchase the domain name through? You should have some basic admin functions to simply forward the name to your webspace.

Who is your ISP - internet service provider - as most come with some basic webspace, where you could upload your web page to, and then just point your domain name at that.

Wouldn't recommend running a web site from your own PC for a few reasons, main being your knowledge is limited in this area and most home ISP services don't allow it. Your PC would need to be on 24/7 and you'd need to be running a webserver - which would need configuring etc. plus you'd have to take of security issues etc. as you'd be more open to being hacked etc. than if using a hosting service or your ISP web space.

HTH