PTs can be overload for medium texture but I agree with the idea to try them in products, one by one. I find I get more volume from mousse & spray gel than heavier oil rich products, but I have fine thin hair too. Never hurts to try a variety of things though! I think your hair is pretty & yes I think 2c is right :-)
fine, thin, normal/(low?) porosity. Mod-CG. Usually I can't co-wash more than 1x a week, & sometimes I have to use T-Gel in rotation due to scalp issues.

Co-wash: VO5 Volumizing
Poo: Giovanni 50:50
RO:TN, Nexxus Youth Renewal, Alba Coconut
PT: gelatin PT, ION EC
Stylers: Giovanni mousse, TIGI Curls Rock amplifier (a-cone), Curls Rock Strong Hold Mousse
Gels: SCC spray gel