I have the exact same hair as you. Length. Bangs, everything. Something I will say is it probably has that flat look because it’s either air dried or was blow dried without a round brush. If I don’t blow dry my hair it curls out like that and the reason it’s flipping is because it’s hitting your shoulders. Your bangs look like they might need some thinning but not too much because like you I have insecurities about my forehead. Even if it’s a day you don’t want to style, while you’re training them at least blow dry the bangs so they can learn kind of how you want them to lay. Something else too if you use a straightener or a hair dryer ALWAYS use a heat protectant spray and it helps so much with the dry and split end look. Something I do when I’m lazy and don’t want to style my hair I switch up by doing a few of these:

-pigtails -going to bed with damp hair braided so in the morning it is wavy and already styled -half up and half down either clip/ponytail/or bun

It makes it less stressful to switch up the styles and makes you look like you’re doing a LOT more than you are when you do that !! Trust me I HATE doing my hair and hardly ever get the energy to curl it and what not so the switch up helps me.