Using Dashboard Page to update individual member data.

New to the coding but not new to Wix.

I created a dashboard page to update my individual member pages through a database (not using repeaters) and I’m trying to to figure out how to use a dropdown list on the dashboard page or other method to call individual line data in my database to make updates only to that line data. For example I want to call and update user 1’s information but not update any other users but later call and update another user information but not update any other users.

Does anyone have a code lead to accomplish this or can someone help me out?