Welcome Anosha to site.Isc is really a wonderfull sitr to improve your writing skills and for beginning you should start with discussion forum which will help you to understand the site better.
As all the new notifications and announcements are placed in this section, it will keep you updated with all the current happnings and announcements in the site . And you can resolve all your querries regarding the site by reading articles about and ISC in article section.
Here you can gain pints and new level like bronze, silver, gold and so on as per the content posted by you and points you gain and you will also earn money for that content.
"It is hardest thing in the world to be good thinker without being a good self examiner"