Changed home folder name - no back up!

I have changed my home folder name without changing the user account name and without any back up at all I have restarted my Mac. This was a big mistake!

Now my computer doesn’t start any more. However bootcamp system with windows is working normally.

Is there any possibility to save my data on Mac now?

I was able to make an IMAGE copy to the external hatddrive with the utility disk. Can I use this somehow?

Is there any possibility how I can solve this problem without making a completely new installation and with