I live in a temperate rainforest with 3a/3b curls and use Redken Acidic Bonding Conditioner. There’s a leave-in treatment too which I use occasionally, but the conditioner helps a lot by itself. I wash my hair with any regular shampoo, put the conditioner in and wrap my hair in a plastic shower cap for 2 hours before rinsing it out. Once a week is enough for me, but you may need to do more treatments to start off.
You could also try Olaplex No 3 if you think you have serious damage. It helps repair the bonds in hair and make the cuticle smoother.
I’m not sure if these products are available in your area, just trying to suggest what finally worked for me. The frizz struggle is annoying and I hope something someone recommends here helps!
You could add nuts like shelled pistachios or walnuts as snacks. Even mix things together to make your own granola/snack mixes with dried fruits, nuts, oats. And you can make different varieties so it doesn’t get old. Example: Almonds, dried cherries, oats. Or pistachios, dried cranberries, pretzels
Or you can buy them, there’s a huge variety of sweet or savory and even spicy in stores.