please don't use MS word to design websites. If you have the budget, try to use Adobe Dreamweaver, but if you don't, there's even Microsoft Frontpage to try instead of MS Word. and besides, PHP and HTML are 2 different things. if you want to buy a web domain (.com, .net, etc) you can buy through godaddy.com using paypal or credit card.
nowadays people usually buy a domain -> go blog like wordpress/blogspot to download template -> setup in own computer -> buy hosting server -> link blog with domain in the hosting place.
how to start a website