The title of this question should be self-explanatory.
You dont need skills as a primary quality. To be a console modder, you need one quality: curiosity. Why is this console like this? You should be brave enough to accept a few short circuits and go from there. I began by making an acrylic door to my computer cabinet, and adding a few lights inside it. then did the same to the pcmcia card cover on my laptop. You just need to be human.
Here is a console modding site, you should pick up a few tips there:
experience, knowledge in electricity, physics, engineering...