Just sucks they don’t provide the x-ray films in the package
You entered the boot selection, which is used for quickly booting into a different drive but it doesn’t change which drive the PC boots into by default. To change that you’ll need to enter the bios proper and you do that by spamming f2 or delete key just like you did with the f12 key.
Before you mess with commands I suggest you to do what I mentioned before. The picture you sent has the grub bootloader and assuming windows didn’t nuke it, when you choose your Linux drive to boot first it should come back.
Also changing the boot order will not break your pc
Just spam del or f2 keys when you are turning your PC on (or check your motherboards/laptops manual for which key it is) that should put you into your bios and there check the boot options/order.
Tho you can also enter the bios through windows, can just search windows 10 enter bios and that should give you the answers
Yeah there’s quite a bit of safety mechanisms in place but I imagine windows could just adjust all the gpu overclocking settings to the max and make the system unstable. Plus just reformat all of your drives
Windows might have changed the boot order in your bios, so just go into your bios and check if the mint partition is set to boot first
Also battle eye works (same with EAC) on Linux you just need to enable it