You can't "make" her come. You'll need to explore and figure it out together. Different women come in such different ways, and she hasn't yet made herself come, so the only thing you can do is experiment.
Here is something important. Sex can feel wonderful even without orgasm. It can feel physically wonderful. It can feel emotionally wonderful. So while the two of you are exploring together, make sure that you don't focus so much on her orgasm that you lose the amazing parts that aren't orgasm.
Play! Get a book on massage and explore what feels nice with no sexual expectation. (Also, there's a chapter specifically on sexual massage.) Transfer that non-sexual feeling of play into sexual exploration and play. I don't disagree with other advice here about tongue's and vibrators and clits, but my opinion is that attitude outweighs all of that stuff.
This great massage book includes a chapter called "Your Animals Too." The next chapter is "Massage for Lovers."
There is no overlap between these two adjacent chapters.