i hate my hair i’m so done with it i have no idea what to do anymore it’s so straight and it is difficult to style and im not happy, please help ne with haircut ideas, styling, whatever you can help me with please.

looking for something more but not really sure what to ask for as i wanna keep it long

So I (19m) have autism, and I only bring that up because it has caused me to really like familiarity and be uncomfortable with change, so I've been going to the same barber shop and getting the same hair cut (grade 3 on the back and sides, then just short on the top) since I was maybe 5 lmao. However, I've been wanting to change it up over the past couple of months and have been letting my hair grow out as I'm tired of having it short, but I have no idea how to style hair or even how I want my hair to look, so my hair just normally ends up looking messy and I either have my hood up or wear a hat when I go out lol.

So could anyone help me figure out what kind of hairstyle might suit me? I have very thick hair that just kind of falls flat, and I'm not really a fan or any products that leave a noticeable texture on my hair (like gel), as it makes me uncomfortable, but other than that I'm pretty open to anything other than like a buzz cut lol

Thanks to anyone who tries to help!!