Wow, that's a broad topic, Noora! The smartypants answer would be to go to
the Forms tab and click the New button and choose Design View from the
list. But it would be mean to leave you hanging like that! LOL.
I would suggest getting yourself a good book about Access. There are
several good ones available, probably at your local bookstore or favorite
online retailer. I am personally fond of the Sybex ones by Getz and
Litwin, but that's just me.
Good luck!