Hi OP. I’m in a similar position to you I think. My hair is wavy (curly in parts) and fine but lots of it. I accidentally dropped into the world of curlygirl when I just stopped blow drying it (which made it bushy and dry) and began air drying. It was a revelation, the awful bushiness was gone!
So then I began further forays into curlygirl stuff… with very mixed results I have to say. I followed it religiously until a couple of weeks ago when I finally acknowledged to myself that it wasn’t working and that I looked like I’d been pulled through a hedge backwards.
So now I am trying a sort of modified CG method:
Wash hair no more than twice a week (I really don’t need to wash any more than this)
Use Olaplex 0 with 3 pre-wash
Curlsmith shampoo
Kerastase chrome absolu treatment, this is NOT CG approved but oh wow the difference in my hair!! I was trying to convince myself I mustn’t use anything but CG approved products and how awful silicones would be for my hair… until I realised my hair just looked shit.
Giving up on total CG and using the kerastase product has transformed my hair from crazy frizzy wild woman to soft textured pretty waves (minimal frizz)
Tiny blob of cantu cream on microfibre-towel dried hair
Air dry
I can’t quite work out why I tried to stick religiously to CG for so long despite the evidence of my eyes!!! 
Basically as long as I avoid any kind of hairdryer (even a diffuser which is awful and turns me into a poodle) and as long as I try to solve the dryness and frizz, my hair is fine.
Full CG wasn’t for me but modified seems to be working.
Hope that helps!!