Please Help..

[NEW2THIS]

HELLO ALL,
I AM TRYING TO BUILD A VIDEO RENTAL/DOWNLOAD WEBSITE.I HAVE NEVER DONE THIS BEFORE, I READ QUITE A BIT AND QUITE FRANLKY IF IT IS NOT IN LAMIN TERMS, I REALLY DONT UNDERSTAND. MY WEB DESIGN HAS COME ALONG RATHER WELL, I GUESS I JUST LUCKED UP ON THAT. NOW I AM TRYING TO CREATE A LOGIN AND LOG OUT PAGE WHERE PEOPLE CAN SIGN UP BY EMAIL ETC, AND HAVE ACCESS TO THIER ACCOUNT WHILE LOGGED IN. I HAVE READ AND READ, AND STILL HAVE NO IDEA WHERE TO START. IF ANY ONE CAN HELP, I'D BE ETERNALLY GREATFULL. ALSO IF THERE'S ANYONE WHO SPECIALIZES IN THIS AND ECOMMERCE / DRM INTERGRATION, I'D BE GLAD TO HEAR FROM YOU, AS IM SURE THIS IS JUST THE BEGINNING TO A LIST OF QUESTIONS. I KNOW YOUR TIME IS VALUABLE, SO IF THERE IS A COST , I WILL TRY AND DO WHAT I CAN, OR IF SOMEONE WOULD POINT ME IN THE RIGHT DIRECTION. THANK YOU