That's sad to hear that your PC won't start. I have been in that situation a few times and it can be very frustrating! You could try some of the suggestions below. I am sure it can be fixed.
It seems the old way of booting into safe mode using the F8 key does not work with windows 10. The first link gives you some suggestions how to fix the failed boot.
https://www.groovypost.com/howto/fix-windows-10-wont-boot-startup-repair-bootrec/
https://www.digitalcitizen.life/4-ways-boot-safe-mode-windows-10
Kind regards
Chris