I wouldn’t waste time with a “baby cage”. There’s no reason to start with a small cage. Since you already have the ideal enclosure, spend your resources building that one out. Tons of foliage, branches, heat gradients, UVB exposures, it’s the ideal environment for a baby chameleon. If you want to use the smaller cage, use it for outdoor exposure when appropriate. As far as your arrangement, looks like you’re off to a good start. I use the exo terra vines as well and love them. I used about a dozen(both sizes), and couldn’t be happier with them. Remember that after you place the plants, allow a few months for them to grow in. You’ll be able to make lighting, misting, and temp adjustments during this time too.