I can't figure out my curl type...help?

My hair is between a 2c and 3a I think. It fits the description of 2c almost exactly, except my hair is very fine. The under layer curls a lot but the top, where more styling is done, lays flat and frizzy. The curls themselves are similar to those discribed in the 3a thing. They are not very tight but are springy and shiny. Can be straightened without too much trouble. I am just trying to learn the best way to style my curls, but so far I'm running into dead ends. Help? 

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