That is certainly a good way to learn, especially if you want to understand how a computer works below the level of the instruction set and how each instruction breaks down to a number of micro instructions and the interaction between the basic components such as the controller, the arithmetic and logic unit, program counter, registers, memory etc. and try a bit of assembly level programming.
Incidentally, I've just published one of these however it is built in software because I didn't want to immediately start assembling a large breadboard project although these can look spectacular. I documented it here and even put it in a WokWi on-line simulator to others can easily play with it.
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