It is a great deal for student or those learner who is new one on web hosting given by Interserver.So lets come to the point.After purchasing interserver web hosting packages. Simply you need to login into your interserver account.Then you will see the interface given below.
Step-1 Click on Web Hosting Option Given below image.
Step-2 Paste the both Default DNS SERVER on your domain DNS Setting then click on Login to Direct Admin Option.
Step-3 Before installing WordPress you must also find the IP address of server go to Account Manager–>DNS Management and paste on Host Names like this-
Then Click on Plugins and install WordPress.after installing you will see the screen given below.
Now You have successfully installed WordPress find out the wp-admin url and do what ever you want to do.
Thank you!