Please help me with my hair

I’m in my early 30’s and I still haven’t figured out how to do my hair or what products work. I’m also suffering pp hair loss (1.5 years pp but still BF and on mini pill) and breakage too I think. I’ve tried everything: sleeping on silk pillowcases, washing my hair every three days instead of one day, drying with cotton t shirt, using chemical free shampoos, getting my thyroid checked, seeing a dermatologist (they specialize in hair too for those that don’t know), hair masks, not dying my hair, not using a blow dryer, coconut oil (much too heavy for my thin hair), etc.

My hair is frizzy, wild, limp, and doesn’t know if it wants to be curly (on the top layer/first pic) or straight (bottom layer/second pic). There’s broken pieces of uneven lengths all over the place (even though I get regular trims). I just feel messy overall. Short of buying 1,000 different products and trying them all until I find one that works - what can I do? Or is there a certain type of product I should be using?

Any guidance or advice would be greatly appreciated. I’m at such a loss. 😔