As for general guide, a basic in website management for joomla based website is the installation of joomla on your live server. This tutorial will guide you on the principal knowledge on the installation of joomla which can be applied to previous and later version of JOOMLA 1.5.xx.
Joomla Installation on live server doesn’t vary much compared to if you installed you joomla on localhost environment. Luckily, installation on live server seems to be easier to be done and will take less than 5 minutes to finish.
The common hack happened to JOOMLA based website is javascript iframe injection or Iframe hack. Although not serious in term of damage inflicted to the website, precautionary steps should be taken seriously. The nature of the attack is not just on platform based/dinamic(ie. Joomla, Wordpress, Drupal, etc.) website, it also attack a static website.
When developing a website, it is useful and crucial to develop it on your localhost(your PC) prior transferring to a real server (web hosting). Although not a necessity, learn to manage a localhost website is a great starting point before you can get on your hand on real web and server environment.