Welcome! Also consider your dew points/ humidity and the elasticity of your hair.

Protein does not work well for many with coarse hair as you say. Porous hair does not necessarily need more moisture (= water) it needs less, it can need more elasticity and reduced porosity from coconut oil treatments. Too much moisture weakens and damages the hair.
2a-2c, medium texture, porous/ colour treated. Three years CG. Past bra strap length heading for waist.

CO-wash: Inecto coconut/ Elvive Volume Collagen
Treatments: Komaza Care Matani, coconut/ sweet almond oils, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss Ultimate Volume, various Elvive
Styler: Umberto Giannini jelly, Boots Essentials gel
Flour sack towel, pixie diffuse or air dry.
Experimenting with: benign neglect