On the beam or as a mount? Personally I don't think on the beam is really "worth it" so to speak, just because you're limited in connection value (can't work out, harder to work in). Also not all that easy to land (my opinion though). If she isn't really quick at it, I'd probably spend the time working on a front salto to two feet, or a front aerial (to stand).
However my progressions for beam tend to be similar. Do the skill on floor UP to a panel mat - until they can do that easy, they're not ready for beam, because they need the "lag time" once they get up there. Put a panel mat at the end of a low beam. Start on beam, land on mat. Put another on top - start on beam, do the skill UP. Do the skill on padded low beam, etc, etc.
Awareness on beam - able to do forward roll to stand (no pushing off beam, no straddle), handstand forward roll, tick tock and front walkover.
For the entry of the skill I would reference the needle kick and back leg drive. But again I'd rather start working the front aerial or front toss with this stuff. If it's too hard for her to land, then improving the front aerial will only make the other skill better too.