I pretty much go with internal Aether control myself in rp, it just makes it easier imo and has provided some great rp so far for me.
I want to go that route as well, basically. Though I feel like different levels should open more potential (power potential) but I'm not sure what makes the most logical sense in order, you know? I don't ever expect my character will reach the seventh or even the sixth levels but aspiring to them is something.
Here's what I found for actual chakra:
Silly link... http://threeheartscompany.com/chakra.html#indigo
I'm thinking of working from Red up towards Violet. I may just come up with an interpretation of what each level means somewhat corresponding to the actual chakra significances but I don't want to tread on lore/anything else if there's something available to reference instead. I suppose the only thing I can think to relate it to, in a much weaker sense, is Rock Lee and his eight gates of chakra.