There’s no need to do all that. Here’s how to do it the old way, which works perfectly and will not cause you a problem:
Turn off bitlocker
If you’re gonna dual boot off the same drive, shrink your windows partition in disk manager so there’s enough space for Linux.
Boot your Linux install media
Go through the process like normal, but be sure to choose where you want to put Linux. In a lot of em the option to pick is “install alongside windows”.
It just works.
You will have a problem sometimes where a windows update deletes the bootloader that lets you pick between Linux and windows, resulting in you booting straight into windows with no choice. People say a lot of things about how to prevent this, but the better solution is to know how to fix it. Your distribution will have instructions just search “fix grub”. Usually the solution is to boot a usb and run some command. The command is slightly different depending on the distro.
A person I know has it written in sharpie on her recovery usb.
Eventually your friends will puke on the kitchen floor. Rather than try to keep it from ever happening, just keep a mop and bucket in the closet like a normal person.