Outlook Temporary Info

 Press the Windows Key + R a run box will come up and enter
outlook.exe /safe

Fix Outlook only starts in safe mode

https://windowsreport.com/outlook-only-starts-in-safe-mode/

Try the SaRA tool

https://www.microsoft.com/en-us/download/100607

https://www.lifewire.com/outlook-safe-mode-4164302

How to delete your profile and start fresh

https://superuser.com/questions/575124/completely-remove-outlook-up-and-start-afresh

also read this to remove profiles by using more official method

https://www.lenetek.com/blog/how-to-reset-microsoft-outlook-to-start-fresh/

Backup Outlook data file

https://www.lifewire.com/back-up-copy-contacts-outlook-1173661

Setting up new profile by adding "backup" to your old profile file

https://www.intowindows.com/outlook-2016-hangs-at-processing-starting-or-loading-profile-screen/