We did ours last week.......I started with just the one bauble to see how our new cats would treat it.........it was off in minutes ! However when we put the lights on it and a few more baubles they were not quite so interested. I put all the expendable baubles around the bottom layer......!
I'm your get pushed partner this week. Want to try a photo with a Droste effect? You may know what this is, but I'm sending this link just in case: https://en.wikipedia.org/wiki/Droste_effect.
At least you have made a start. David got our tree down from the loft but it is still waiting to be decorated. Been to hot the last couple of days to even attempt it.