On the batteries – good, but I would recommend that you immediately invest in at least in a baseline “good” charger. Xtar has a sloooow USB powered one for <$10 that is accurate and got a favorable review from HKJ – here is the review. Be sure to get the MC1, not MC0 – it’s physically too small for your batteries. Personally I’d use at least a slightly nicer charger just for speed, such as an Xtar wp2-series charger or a Nitecore i2. You wouldn’t want your crap eBay charger to damage the cells you picked up for such a good price now would you? (or burn down your house [/scare-tactics])
You may eventually want to customize that driver into an offtime driver instead of ontime, it’s more intuitive by far! At your current investment level though I’d say you are a little ways off, you’ll need to drop another few dollars before you have the required equipment. Look here for some more information on flashing. Offtime also requires a minor hardware change that involves soldering, so if you don’t have soldering equipment there’s that challenge as well. Baby steps.
Anyway the stock Fasttech Nanjg 105c firmware is great for the money, can’t complain much about it. (I do prefer the traditional Nanjg 105c firmware due to my loathing for mode groups. Or better yet, a custom firmware 
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