You can always start by touching her arm when you or she makes a joke. Personally I tried this and it worked : If she's playing with her phone (make sure you have at least established comfort between her and you) take it or make her put it away! It'll allow you to get initial physical contact and bring the attention to you. It'll also show that you are dominant in the relation and that's a start. Then there's the usual leg touching which I find is pretty lame but it's a start.
Begin from the top of her body and move onto the lower parts

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I was able to get her touching my crotch in 30 minutes and it felt good

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Hope this'll help.