If anyone's looking for an easy curly method I do flip coat scrunch which is the easiest and cheapest I've found. There's a hairdresser on Instagram who does videos of it, you might find them under the #flipcoatscrunch hashtag.
I wash and condition my hair normally with whatever is cheap and I like the smell of, often Lidl's own or Alberto Balsam etc. You want something cheap enough that you don't mind using plenty of conditioner as it helps you detangle. Expect to use conditioner at a ratio of 2-3 bottles per bottle of shampoo.
Before rinsing the conditioner I flip my head over by bending forward in the shower and rinse while detangling by raking my fingers through as if they were a comb.
If your hair is fine then you'll probably want to rinse all the conditioner out if it's thicker and coarser then leave some in so it feels smooth. Your fingers should be going through it easily at this point.
Then I turn off the water and rake through some cheap gel. The best I've found that is easily got from supermarkets etc is Shockwaves, usually £2.25 for 200ml or cheaper in The Range/home bargains sometimes. Use quite a bit of gel, you know Tunnocks teacakes? At least a blob that size. Then scrunch your hair, it should feel and sound all squelchy and look stringy at this point.
Then I flip my head back over to the right way up and see how mental I look. If it's all stuck to my head at the back then I might rake that bit through with my fingers and scrunch it again or shake my head about a bit, that's all. Scrunch until it's not dripping too much. Don't do a parting or anything don't bother plopping and put a towel round your shoulders for drips.
Then allow to dry for a few hours (this is what I usually do, if doing this you may want to wash early evening rather than morning) or diffuse if you want, in a pinch you can use a normal hairdryer on lowish speed as the gel should protect your curls enough to get a good result.
When it's completely dry it will be all crunchy like it's the 90s and you'll curse me for convincing you to try this but if you just scrunch again (upside down is easiest) you'll break the cast and reveal nice defined curls.
If you put your hair up in a bobble or scrunchie or clip or whatever at the top of your head (yeah sexy) at night time then it'll last a bit longer. Some people can go a week between washes with this. My hair is very porous (mostly grey, dyed) so mine doesn't last as long but I wash about twice a week.