

if OP will use “dd” then they need to make sure that new disk is bigger than old disk.
Even then after the “dd” command is complete, the new disk would appear to be same size as old disk. OP would then need a disk resizing tool to reclaim the remaining disk space
There is a few bytes at the beginning of the hard disk that tells the BIOS from where to load the OS.
These bytes don’t belong to any particular partition.
What you want is very doable you just need to reinstall the bootloader after or else your system won’t boot.
Try to find a Linux person near you to help or if you want to test for your self. Make a simulation using a virtual machine and see if you could accomplish what you want there before doing it in your real system