Well one you have to stop straightening. What is your routine? Do you know is your hair fine? Do you dye? Are you getting breakage? Do you deep condition? The whole wave and curl thing is about a moisture protein balance. What products are you using? Do you know about using something gentle like a t shirt to dry? No rubbing! Don't brush and get a shower comb and try only combing when there is conditioner on your hair. If I did not use conditioner, stylers and a hard gel my waves won't stay. Using curly methods and those products I can get 2b hair and occasional spirals. (More and more) at 5 months and am only just starting to get consistent results.
2a medium porous, You can see my wavy tutorials here: https://www.youtube.com/playlist?lis...ZNxhBHSXAW40OQ and my wavy blog is The Wavy Nation http://wavynation.wordpress.com