Hi everyone...for the love of everything somebody please help!! Im no sure if this is posted in the right area/page/etc ... and forgive me...but im so lost and frustrated...

I have kali linux installed on a laptop, I just did an expensive course, it was great, i have alot of programs i made i cant get back etc etc.. advancved users have mercy, sometimes a little knowledge is dangerous and im learning... so Best I can tell, the only 2 fatal things that happened was I was trying to run a script on startup, I was googling so many things, I may have edited something in like /systemd/system .. ?? (nothing will be very helpful, im new, advanced users may be able to figure this out and i was looking at a lot of "init" files ... init.rc ?? init.d ?? something... i have a vauge recollection whatever file it was was only present in /root ?? maybe? ... things were well (I hadnt rebooted) i did other stuff for hours, at one point the computer seemed to hang, I think it was running a program and i was (i know I know) lazy and it wouldnt give me control so i hard rebooted (I know..) , and .. maybe expectedly...it now seems to boot up, load grub, then exit to a (initramfs) prompt .... the error is:

run-init: cant't execute '/sbin/init': No such file or directory
Target filesystem doesn't have requested /sbin/init.
run-init: can't execute '/sbin/init': No such file or directory
run-init: can't execute '/etc/init': No such file or directory
run-init: can't execute '/bin/init': No such file or directory
run-init: can't execute '/bin/sh': No such file or directory
run-init: can't execute '': No such file or directory
No init found. Try passing init= bootarg.

BusyBox v1.30.1 (Debian 1:1.30.1-4) built-in shell (ash)
Enter 'help' for a list of built-in commands.

(initramfs)

Then im stuck at this prompt. If it enter 'exit' ...

Then it continues with Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000100

etc....

I have been looking online for answers for days now, I have tried fsck, I have booted from live usb and run the gparted check on the volume,

I am so lost and frustrated and have no idea what to do or where to go next, ive watched every youtube i can find ...

Im almost at the point of having to reinstall, and I realllt really really dont want to loose all my coursework that took me weeks, ill never do it all again.

Superman (or woman) if your up there...please help! or email operationsiphone1701@hotmail.com