How can i create an Adim password to enable the Admin profile to have global priorities and a second account (limited user) with acces to 'input' data only?
Almost every aspect of Access can be learned by trial and error EXCEPT SECURITY.
Get a good security guide to help you through the twilight zone of Access security. I would suggest:
http://www.geocities.com/jacksonmacd
download the first file – Security Paper by Jack Macdonald. It’s a little long but it tells you everything you need to know.
Remember to make a copy of your database and use that for your first few tries at security. Trust me, you'll screw it up the first few attempts.