I do the curly girl method and love it. You need to use conditioner and styling products with no silicones, waxes or mineral oil if you are not using shampoo. You can wash your hair as often or little as you like.
You can do a modified curly girl where you use no products with silicones, waxes or mineral oils in but you can use sulphate free shampoo. I do full conditioner only.
Conditioners I like are:
Superdrug extracts (all conditioners are CG friendly)
Wilko happy hair (as above, all types OK)
Tresemme botanique coconut or Tresemme Undon (these are the only Tresemme ones that are CG friendly, Undone is being discontinued though)
Yes to Blueberries and Yes to Carrots
Garnier Ultimate Blends white bottle one (rice and oats I think).
To wash with conditioner, you need to use absolutely loads (I use 3 big handfuls to wash), put lots all over your scalp and roots plus through the lengths and really massage and scrub it in. I add a bit more water and scrub again then rinse really well with warm-hot water while scrubbing too. Then I add more conditioner, wide tooth comb or finger comb then rinse that out. I then add a little bit more that I don't rinse, as a leave in. My hair always feels super clean and looks much less greasy than it did before. Also, when using silicones, I could never wear my hair down the second day after washing as it just went into rats tails but now I just wash every few days and wear it down all the time.
Styling products I like are Umberto Giannini Curl Jelly or Pantene curls mousse although at the moment, I just leave in some conditioner and am finding my hair happiest with that. If your hair is crunchy when dry after using gel/mousse, then scrunch out the crunch till it isn't. Oh and use a t-shirt rather than a towel, either plop your hair (wrap up in the t-shirt) or just scrunch some water out with it.
At night, I just put it in a high pony tail or bun with a satin scrunchie and in the morning, I take it out and run a little Boots Botanics hair serum (I love that stuff!) over it to get rid of any frizzy bits and tame it a little.
Sorry - a bit long!!