you might want to check out the thread

Lots of information there

There is a youtube Guru mahoganyCurls

who has tighter curls and ways she takecare of them. you can get information from her videos.

There is also a 3c forum 3c - CurlTalk that might help.
3a with some 2a-2c, Medium/Low Porosity
Co-wash:deva no-poo/Vo5 kiwi
Leave-in:Shea Moisture/GVP conditioning Balm/AOHSR

Since long hair- I finger twist in big chunks, which helps till 5th day hair
Gel:LA sports
Plop: Old T-shirt for 15 minutes ,diffuse