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, growing out mechanical and chemical damage = breakage and very high porosity. Past armpit length heading for waist.
CO-wash: Inecto coconut
Treatments: Komaza Matani, coconut oil, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume, Inecto argan
Styler: Umberto Giannini jelly, Boots Essentials gel
Experimenting with: going back to basics