Dear Susan,
Put whoever sent you to Moodle on your Christmas gift list. This is excactly the right place for you. Moodle will do what you want and more and you are now part of a friendly, helpful support community.

You will obviously want to take Moodle out for a spin for a while and see if it is the way you want to go. If you do, indeed, decide Moodle is for you, take a look here:
http://moodle.com/partners/. Moodle partners live and breathe Moodle and they can help you do the job right.
Just my two cents, of course. Others may see this a little differently.
Good luck!
-- Art