for now your hair is wavy, you'll learn if it's curly after taking care of it and styling. if it's been long term neglect it'll take a bit to bring out your curl pattern. everyone's hair is diff so you'll be trying out diff products until you find ones that work for you. start with finding out your hair porosity and hair type, google has a bunch of guides for these. stop dry brushing it, detangle in the shower with conditioner. like other's said your hair seems quite fine so look for light
products. you don't have to style your hair all the time but if you want to bring out the waves/curls that's where they're going to be most defined. everyone has their own products so again, experiment and find what works but for me i usually spray it with heat protectant, a hydrating curl spray (kinda works as a super light leave-in but you can use a light leave in cream), mousse (volume), and gel (holding the curls/waves). i like to plop for 10-15 min before diffusing but you can go straight