Decide what kind of music website you would like to start. If you intend on promoting your own music, then start a music website dedicated to your music. If you want to start a music website that does album reviews and general music news, then start a music blog.
Purchase your desired domain name. To check the availability of your desired domain name, use http://instantdomainsearch.com. Pick a domain name that is easy to remember or is applicable to your music website purpose. If it is a music website for your own music, then make sure your domain name includes your band name.
Decide which hosting company you would like to host your domain. In order to upload content on your website, you will need a web host to host your website files. Each hosting company offers different bandwidth and storage packages. If you anticipate your site becoming popular, you should invest in a hosting package that offers ample amounts of bandwidth. If your website may not get many visitors but will be used to store a large amount of files, then get a hosting package with more storage.
Use HTML or an HTML editor to build your website. Make your website aesthetically pleasing so people will be more prone to stay on it. If running a music blog, install a blogging platform such as Wordpress or Moveable Type in order to save yourself the trouble of updating via HTML.
Promote your website. The more links that are pointing to your website, the higher it will be ranked in Google search engines. Use social bookmarking sites such as Digg, Reddit, Stumbleupon and others to promote your site and build links.