Hi - welcome to the cnczone.
It will certainly be a pleasure to read your posts about wood working.
For a very low cost, you can purchase some well made "starter" plans. Some examples are here:
Some of these even come as pre-made kits if you prefer that route. The benefit of the plans is that so much of the concept work is already done, and so many details for items such as stepper motors are already shown.
The alternative route, which is what I am doing, is to read for about 6 - 12 months, then start building. If I were to do it over, I would just buy some plans and edit them as needed.
In answer to your question, the 1/4 - 20 is not going to work.