School routine!!!

I decided to go all natural during this summer for the first time. I didn't want to get box braids anymore because I was so tender headed I've been natural for 2 months or so now and I can't seem to find the right day time routine. I usually wet my hair with water and my curls look amazing and then I add in my Cantu leave in conditioning foam and then I spray a mix of water, jamcian balck castor oil to my head to seal it. But my hair always seems to end up dry idk what I'm doing wrong I just need some tips. Also i have no idea the porosity of my hair I think it's low porosity because whenever I add moisturizer at night especially after my shower it just sits there. But idk why it looses it's moisture so easily