Rather than trying to "push" her into position, see if you can "lure" her with treats, then click and give the treat. So for instance, if you hold a treat above her head, she may go into a sit, or reach up with front legs off the ground. Or she may paw at your hand, whatever it is, reward that behavior and when it is consistent you can give it a name (such as "sit" or "paw" or whatever). Don't get frustrated trying to get a nice clean "sit", just find a behavior that you can reward with the clicker, and you will be well on your way to training her.
Or you can patiently sit and watch her, then click and treat when she sits spontaneously. After a few times she should start getting the jist of it, and you can name it. She will love clicker training!