https://askubuntu.com/a/1253617/1098871 is the link to the process I followed.
At step 42 I get an error, ' grub-install: error: /boot/efi doesn't look like an EFI partition.'
Screenshot @ https://drive.google.com/file/d/1HUBYBUIoP16WXVrgSErspYMyVbHs78MR/view?usp=sharing
Help me out with what I should do from here , I'm clueless !
@C.S.Cameron @Ravexina
After much fretting, I got a working solution. The solution would be to simple type in sudo mount /dev/sdx2 /boot/efi
before attempting to install grub.
Thank God I did, because no one here responded.
Anyway, the answer is here. I did it.
I post this answer for anyone who needs help in the future. A more detailed guide including Daniel's guide and some additions by me for adding drivers for Macs and Nvidia GPUs as well as useful generalisation to apply to any distribution of Linux :
https://docs.google.com/document/d/14PWThtbylgmqsnQbR8hUbgU6hfh55GJ9N1EOEEbrnzg/edit?usp=sharing
The document mentioned above is written with 3 purposes: