Okay, I recommend careful removal of the length -- cut too much while wet, and your hair may wind up curly rather than wavy when it dries. I speak from experience.
My hair is also thin and fine and wavy. (It wasn't always wavy, I had a texture change when I hit late 30s... in fact, throughout college I would get perms). I posted some hair pics a few weeks back if you want to see what happens when I air dry, versus straighten. What I've learned is that the shorter my hair is cut, the curlier my hair is! At the length in pic 1 and 2, i wouldn't be "tousled" -- that only happens if I have straightened my hair and I get caught in a light rain storm, or I'm working up a sweat on a hot dance floor, which provides just enough moisture to release the waves. It's rare but totally magical when that happens. Hee hee...
Layering is definitely required or I get that triangle effect. Layering, of course, releases even more curl.
The techniques RoseandJean recommended work too, though I agree you have to be careful with that one. I had that done with my latest cut, it looks good and it's easy to work with but I swear my hair is much thinner now. Not necessarily in a good way. My hairdresser did mention, while cutting my hair, that my hair had thinned significantly since my last visit, she brushed it off as stress and normal growth cycles, and assured me that it was already growing back. But I don't know. It did not seem as thin before the cut. I'm bringing this up since you mentioned your own hair is scarce.
Often my hairdresser cuts my hair wet, blows it dry, then finishes cutting it, so she can work with the wave and persnickity-ness. This is a great option for wavy hair. You just have no idea how far it's going to curl up. Curly gals often get their hair cut dry, not wet, for this very reason. That may be a good way to go for you!