Unfortunately, the details of how all this works will vary from server to server, depending on the particular OS (Windows, various distributions of Linux, etc.) and the particular configuration of the host. Some will allow you to create databases via PHPMyAdmin, some will assign you a single previously-created database, etc. My suggestion would be to find someone local who has experience with web applications; OJS is a fairly standard LAMP application and anyone who's installed one before (e.g. Drupal) should be able to set you up within an hour. Once this is finished you should be able to run the site without any particular server admin experience, except for the odd upgrade (which again is a fairly straight-forward process).
The Simon Fraser University does provide hosting and support services; see http://software.lib.sfu.ca/support.html
Open Journal Systems Team
Don't miss the First International PKP Scholarly Publishing Conference
July 11 - 13, 2007, Vancouver, BC, Canada