Loading members details in a editable form

Okay, you’re getting there. I think what you want is something more like this:

$w("#dataset1").onReady( () => {
  // get the current user's email
  wixUsers.currentUser.getEmail()
    .then( (email) => {
      // set the filter to only show items where "email" field 
      //matches current user's email
      $w("#dataset1").setFilter( 
        wixData.filter()
          .eq("email", email)
      )
    } );
);