Well, let me start by explaining the process what I did. And If I'm wrong anywhere please correct me;
1.Purchased a baby hosting plan from Hostgator for 3 years
2.Registered a Blog on WordPress called zmyblog.wordpress.com
3.Using my a/c info logged into the cpanel of the hosting
4.Using Fantastico Deluxe installed the version 2.8.6 on the main directory i.e zmyblog.wordpress.com.
5.logged into my wordpress.com's dashboard
6.couldn't find the plugins
7.Asking some Help!!
Edit: I've been purchasing blogs which are already setup but this is my 1st time installation...so I'm a noob in installation could someone give me any step by step info:(