What are your hair properties and what are all the products you are using? Have you heard of the Curly Girl method? If you have no idea what I am on about check out the stickies on the newbies and this board.
That mousse is a chemical soup, I don't see anything that will benefit hair, just stuff that can build up. Do you have a dry scalp? Beneficial ingredients may not be able to penetrate if you hair is coated in silicones (suffix -cone, -conol, -xane) and polyquats so consider eliminating these from your routine.
Oils and butters don't moisturise hair in that they do not add or attract water, they help seal and protect, some can absorb into porous hair especially coconut oil. Coconut oil plus sugar syrup/ honey make a wonderful moisturising deep treatment and these should be ingredients you can source in Africa.
As far as styling products you might experiment with making up an Ecostyler custard (basic hair gel plus avocado or coconut oil, see YouTube), a good quality aloe vera gel (natural humectant so attracts water, but not suited to all dew points/ humidities) or DIY okra gel. These might all be items you can source/ make in Africa?
It's not necessarily drying or damaging to use a diffuser, just use a low heat and leave hair still partly damp. Daily wetting/ washing can be damaging especially if you have porous 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.
Treatments: Komaza protein, Komaza Matani, coconut oil with sugar syrup. Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume
Styler: Umberto Giannini jelly, Boots curl creme, Rockin RInglets
Experimenting with: Mega-Tek, Curl Harmony reviver, Elvive Full Restore 5.