Is there a guide to dual boot manjaro 21.1.1 on the acer nitro 5? (AN515-54-54W2)

DeleteButton
DeleteButton Member Posts: 19 Troubleshooter
I want to move away from windows since Microsoft adds memes like Cortana and this. Also, they're gonna be adding more and more ***** in win11. So far trying to dual boot win10 and manjaro has been a pain to do. I made a 90 GB empty partition in win10 before trying to install manjaro. 

I had a few problems trying to install manjaro. At first, I modified the 100MB win10 bootloader partition by giving it the /boot/efi mount point and the boot flag. I also made the 90GB partition into a root partition. When trying to continue to make my user, I would get a "no EFI system partition detected" warning. I was able to install w/o the warning by making a 512MB partition w/ the fat32 file system, /boot/efi mount point, and boot flag. I also made a 20 GB root partition and made the rest of the 90GB partition into a home partition. 

(read this Reddit post for extra information to the next part of this post.)
I was finally able to install manjaro but it kind of failed on me. Upon installing manjaro and rebooting, I was unable to access the bios. I was still able to access the f12 boot menu, so I was still able to boot into win10 and manjaro. I was able to get back access to the bios after following the steps provided by PlanetMercury in this thread here (scroll down a bit and you'll find his post). I enabled secure boot, choose the grub file as a trusted boot option, and booted into the file thorugh the boot menu. I would get a grub rescue screen seen in the Reddit post. At this point, I was a little stressed and tired so I decided to get rid of the partitions after a few days of pondering. I went into a manjaro live USB, opened GParted, got rid of the 3 partitions I made, and got back my 90GB partition.

And this is where I am now. only win10 with no dual boot. I want to try again but I wanna know the steps i need to take so that it doesnt lead to the bios becoming unaccessible or being unable to boot into manjaro. Is there a guide on how to install manjaro?