get rid of NEW outlook and get it on my desktop

I had to reinstall my Office from my school. It is Microsoft 365 for Enterprise. Now I have two problems with Outlook.

  1. It is only online, not on my desktop.
    and
  2. It has gone to ‘new Outlook’, which I hate.

I have a Dell Inspiron with Windows 11, 32G of Ram.
Any ideas on how to solve both of these issues?