Suggestion for a new modder:
Unless you can do the design, analyze the limitations of each component, and test the performance against the design, build something that has already worked for others.
If electronics is not your 'long suit', copy a design.
If you want to learn, take little steps. A few dollars in resistors, LEDS, switches, some AA 1.2 volt Nimh cells, a battery tray, and you can learn as you play

LEDs are great teaching aids. Get a cheap digital meter while you're at it.
Modding can be fun especially if it's a leaning exercise also.