Hey!
First, you need to sign-up as a user at Hotmail.com (for example). To do this, go to www.hotmail.com
and click on Sign me up. Then, enter all your details (dont hesitate, they keep it confidential!).
Then, after registration, go back to www.hotmail.com and type in your login id and password that you
gave at registration. Click on login. You will be taken to your Hotmail mailbox. Click on Inbox to
see emails that you've received. Click on "Compose" to send a message to somebody. Click on "Folders"
to organize your emails.
I suggest you get use to the Inbox and Compose features first and then go on to explore the others.
Hope this helps. Please rate me and let me know if you have any more questions.