From what I've seen of your hair, if you are wanting to wear it naturally curly, I think devacurl will be a great product. Definitely use it as the videos you watched show, and leave almost all of the conditioner in. I pin my hair up while I wait for it to dry to help the curls keep their shape, but the "cast" that the anGell forms definitely does a really good job. I am so in love with these products after less than a week, I've given all my other curl stuff away. I didn't believe anything could work like this, because I've spent so many years trying so many different products.
If you like the products once you try them, definitely try to find a deva stylist, my sister has been cutting my hair since she started cosmetology school (she graduated 6 years ago, lol) and she is an excellent stylist but just didn't have a clue what to do with curly hair.