Creating a CPU

Depending on how complex you're aiming.
You could make a 4 or 8 bit cpu yourself in fe months.
A 16bit would be hard.
As for modern cpu forget it, it take Townsend of people to design one

This. Take a look at en.wikipedia.org/wiki/MicroBlaze OP, you can even even target that instruction set with GCC.

With some understanding of digital circuits, and FPGA programming, you could realistically create your own Soft-CPU.

Pfffft... You can make a more powerful one from MINECRAFT BLOCKS.
minecraftforum.net/forums/minecraft-java-edition/redstone-discussion-and/349591-hack-iii-minecrafts-most-powerful-computer-to-date

youtube.com/watch?v=SPaI5BJxs5M&app=desktop

It's possible if you have equipment

PIC is pretty simple and documented, I think.

youtube.com/watch?v=rdT1YT9AOPA&app=desktop

Mechanical computers are doable with appropriate levels of autism

Fucking studying what a computer is.
How do they work.

Sure but how are you going to solder minecraft blocks onto your mobo?

Holy
Fuck

It's the save difficulty. You just change the verilog to work on 16 bits instead.

a towelhead made a cpu?