You could do like I do. Apply your stuff upside down, then flip over and scrunch some into the top. I like to do it that way cuz I'm curlier underneath and can't get it all the way through the underneath.
I'm a 3b, with 3c underneath.
Used to be CG, now I'm not. Using Suave Aloe & Waterlily shampoo & condish, JoiWhip, BRHG, Suave Aloe gel, Aussie Tizz No Frizz, and anything else that looks good!