As far as LEDs and boards, that's all buyer's choice. They are all more or less the same with small variations between them. I get all mine from Ebay sellers in China because they are dirt cheap. Usually the "exact" questions come along the lines of what resistor(s) is/are needed. This depends solely on the LEDs being used, and how you want to wire them up. You might check this thread, and throw out any questions you have there http://gmtnation.com/f33/how-get-started-led-resistor-mods-861/
(so you don't pollute your own thread) As for how to solder, your best would be to watch some Youtube videos, that's how I learned.