Not transitioning but I do cowash and think highly of it. My hair made was transformed after I took the plunge and cut back on traditional sulfate shampoos. My guess is you have nothing to lose, so why not give it a try?
One recommendation if you go for it: I'd do one last sulfate shampoo just to take care of any product build-up you may have. If you want to start using a cheap but moisturizing conditioner, one that's popular (I use it too), is Suave Naturals Coconut. You still may need to use a sulfate shampoo once in a while - again, to prevent buildup from conditioner and whatever stylers you use on a regular basis.
Another consideration is frequency of washing and co-washing. You can experiment with washing and even cowashing your hair less
, to see if the condition of your hair is further improved. Good luck