Hi,
No, you'll need to use your 'Admin' user ID to login. No password to go to enable mode (based on your config).
See below:
Router con0 is now available
Press RETURN to get started.
User Access Verification
Username: Admin <--- triggered by 'login default'
Password: <-- Admin pwd here...
Router>
Router>en <-- no password
Router#
FYI, the 1st aaa line will be used to authenticate all access.
Rgds,
AK