How to make curls stay in my pin straight hair?

I have very straight, long hair. When i curl it with a curling iron, hot roller or anything it falls flat within 10 mins. you would never be able to tell it had a curl in it. my hair is layered and it comes down to my bra strap.

How should i curl my hair and what product should i use on it. i don't want to burn the sh!t out of it.How to make curls stay in my pin straight hair?
when its wet put Aussie aussome VOLUME styling mousse to it and scrunch it, which is like grabbing a handful of hair and squeezing i guess you could say.add more mousse when needed. finish with hair spray like aussie sprunch or aussie maximum hold

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