can i start with drupal

It is my understanding that what you want to do can be done with a simple install - no php required. No additional modules needed, either. Just install it, and configure some basic core modules. You may start with the Drupal Handbook to learn the specifics of allowing members to comment on nodes, etc. Once you get started, you'll find its pretty easy to pick up some basic things. http://drupal.org/handbook/customization/tutorials/beginners-cookbook is a good place to start.

For the site you mention and much more features its not necessary to have an understanding of PHP.You just need to install drupal and need no additional modules.So i would ask you to setup drupal as it is first and then go to< http://drupal.org/project/Modules > and find out for yourself which modules you like to add to enhance your website.

Adding some initial steps that a beginner can progress through for knowing and understanding Drupals features....

1.Its always better to have a facility to fearlessly test and experiment easily and faster with the new drupal and its features on your own computer and to try the new modules which you like to add before you add them on a live production site.For this you will need to setup drupal in a localhost .Its easy to setup one by installing wamp .You can download it from< http://www.en.wampserver.com/ >and watch a screencast on how to install it at < http://www.lullabot.com/node/275/play >

2.Download a version of drupal.For the site you mentioned any version of Drupal will be "more than wat you need".You can choose D6.2 as its the latest in the line.The instruction and screencast on how to install it are available on the drupal at< http://drupal.org/drupal-6.0 >.And in the case of wampserver you can untar the drupal file into www folder of wamp on your system.

And then its left to you to see and appreciate the power of Drupal and be a fan in no time.

All the best for your website.