You will need to know the C language, not C++. As with many things you will follow an example, then another, then after a few you will walk using your own legs.

You will need to know the C language, not C++. As with many things you will follow an example, then another, then after a few you will walk using your own legs. To build a module you don't need to build the kernel, but you do need the kernel headers, you will understand all this once you get to understand a bit of C language, and a bit of assembly won't hurt. Start with MIPS. You do need a good grasp on the C language, and a lot of time.