Idk how to style my hair

Hi everyone,

This is what my haircare looks like after hairwash. I have tried using leave in conditioners, serums, hair masks etc but my hair is too thick and it frizzes up easily. I tried using the blow dry brush from mane but i ended up gettig crazy split ends from using it. And yes I did use heat protectant.

I want to get a haircut but I dont know what style of haircut would suit my hair. I want to keep my length but maybe make it more stylish? Last time i got layers but the stylist said it wont look that good since I have thick heavy hair. I am so confused.

Please any advice would be appreciated! Thank you in advice.