Fasm OS file loading and control transfer?

Question

assembler

I want to make the OS inappropriately yelling like this is impossible, etc.
I just need to understand how to make the bootloader load the kernel and give it control on the net, rummaged through the sectors of the tracks, etc., and maybe somehow find and load the kernel by name in one word fat how to connect and how to use
I am a beginner programmer, please