Hows the training going?
Are you using any kind of verbal or sound cue so the bird knows its doing the right behaviour?
I would definitely just start with step up, reward.. step down, reward.. on repeat for a session or two until things are smooth, and then move on to a hop from the stand to a hop back. Be very carefull training a partially flighted bird, you dont want to lose the confidence or even worse fracture a bone on a hard floor if the bird misses your hand or the perch..
There are tonnes of other things you can train until the primaries come back through.
Just a thought