I think the above advice is excellent. Also, I just wanted to add that there are recipes for stuff like honey rinses here too, alongside homemade deep treatments and stuff. They can help while starting, until you look around and see what products you think will work and you want to try.
I'd reccomend getting a diffuser. It attaches onto your hair dryer, and helps to dry curly hair without much frizz. Also, only brush your hair when it's loaded with conditioner and in the shower. You may want to use a wide tooth comb for this, because it's easier on your hair. For days between showers, you can sleep while pineappling (putting your hair in a very high ponytail ontop of your hair). It helps to keep curls.
Satin pillow cases apparently do wonders for frizz, so you could buy one or make one yourself.
If you need some drugstore product suggestions/reccomdnations, to start, I'd be happy to help. Just PM me.
I tend to buy from them rather then online, as it's much cheaper. Drugstore products may not deliver the best quality, but while your starting to learn and try out different things, they're more affordable (no need to waste 20 bucks on a product that doesn't work