Setting up an email account is very easy. First you have to login to your web hosting control panel. You can do it via the web bwoser by going to your domain name slash cpanel. Example, if your domain name is mydomain.com then you would go to mydomain.com/cpanel. You can also login to your account here at adtastic.info, go to your products and click the cpanel button next to the hosting account you want to setup an email for. That will also log you into cpanel.
The login is as was supplied to you when you commenced the hosting service with us. Once logged in you will see a section for "Mail" and in that section a section called "Email Accounts". From there it should be very straightforward to set up your email. If you still have difficulty, click the help button in the top right corner once you are in the email section.