Thanks for your reply, ladies. I appreciate the help.
I'm still struggling with porosity -- I seem to have 2 different things going on. The hair on the sides of my head is very soft and finer -- when I run my fingers up the strands, it's smooth and squeaky, indicating...low porosity? But since it's finer hair, oils weigh it down, which makes me think it's actually porous and would prefer protein? It also dries quickly. The hair at the back of my head, I think, is medium - low porosity. It's a little rougher, dries much slower, tends to like moisture and can handle oils much better than my finer hair.
How do I handle this conflict? Rotate between moisturizing and low-protein co-washes, or try to apply different conditioners to different areas (which seems like a pain)? As a whole, my hair does seem to like ACV rinses.
Thanks for any advice