my impression of the metolius mega sets is that generally the work best on less steep walls - vertical or slab, due to the generally smaller hold size. So you may want to avoid an overhung wall, and additionally until she is a little older.

Here's a video of a baby climbing a vertical wall. this seems like what you might be going for. Here is a young one on a slab wall. In both cases I think they have a few more "jug" holds than what you have in the metolius set. Consider supplementing with something easier to grab like a set of mini jugs or these.