Macbook Air freezes for Admin login

Try running Disk Utility First Aid to see if any repairs are needed to the file system.

Do you have a backup of this user account? If so, then deleting and recovering it with Migration Assistant from the backup may be the easiest option to "fix" the issue.

Since Safe Mode isn't working either that probably eliminates Login items. It is possible there is some corrupt preference file preventing you from logging in. If you have apps re-open on login, perhaps one of these apps is the problem or a file one of these apps is accessing. I don't recall if Safe Mode relaunches your apps when you log in.

You can use Carbon Copy Cloner (CCC) to easily make an image of your user account so you don't lose anything.

If you know your way around the command line you could try deleting preferences within your account or prevent apps from automatically re-opening to see if you can find out what is blocking you, but I do not recommend this unless you are familiar with the command line as it is very easy to make a big mistake. If you try, then make sure to have a current backup of all your user accounts and use CCC to image the data in the broken account.