Good luck. It'll be fun and you'll learn along the way. There's so much written about CBG amps that it can be overwhelming. One option would be to consider a "kit". http://www.cbgitty.com/amp-kits/ It has all the parts you need and instructions for putting it together that makes it straightforward. You can also Google or Ebay CBG amp kits and find all sorts of options. Tone Monster (store on eBay) also has numerous pre-wired and harnessed options to put into your own box, with different sizes and options. You can build your own with components and a printed circuit board and do your own soldering and wiring as well. Just depends on what you want to do.
I actually have one and might do that with it... It sounds decent for it's size and no frills. My only gripe with it would be resolved if I did that, is it very easy to knock over. I keep it on the floor when using becuase it is so easy to pull off of whatever it is on because it is so light. hmm, i may do that for her tonight and surprise her...