Also v fine hair but lots of it.
I do curly girl and my hair has never looked better. Curls can now look like 3C when previously on a bad day they would be 2A. Personal opinion is that fine hair can't manage on co-washing and you do need a sulfate-free shampoo, not just co-washing with conditioner or you get so much build up your hair is weighted down and looks dreadful.
My hair hated Bodyshop Rainforest and looked like dried up straw but I know lots of people on here swear by it.
I wash with sulfate-free shampoo, then conditioner - lots. Rake it through my hair and get out all the tangles. This finger combing is all the combing I ever do - I don't comb or brush my hair ever. Then curl cream on soaking wet hair followed by gel and scrunch like crazy. Wrap up in towel dream of microfibre towel which is meant to keep more curl in then either leave to dry naturally or diffuse. Attempt not to touch hair while drying except to scrunch up a bit more or twirl a few curls round.
Second day - wet hair a bit, run more curl cream through and scrunch up. Leave to dry and loads more curls again.
Didn't think it was possible for me to have this many curls my whole life but I do! I get all my products online from British Curlies - so far have loved Jessicurl and Boucleme. Am not sure which brand you pick makes much difference as they are all using much the same things.
Honestly this takes me very little time - no brushing, no combing, no styling, no heat, hair usually dries in the car on the way to work. Gel and cream takes a minute at the end of the shower. Plus my hair doesn't even need washing as often - it used to need washing every day - now it's twice a week.