If you're in a hurry, or you just don't want to mess about with local web server installations, you can find a commercial hosting service and host your online store there. Nowadays, most companies support Drupal without any problem, because it's very popular and there is high demand for it. Look for a provider with reliability and speed of access, with plenty of web space and bandwidth. You need FTP access to upload the required files, and enough privileges to create a new database and to edit
Go to http://drupal.org/hosting to find a list of companies that provide Drupal hosting services.
When you select your hosting company and sign up, they'll give you a username and password and ...