Well some good news, the brown leaves were not brittle ... I think by
tonight it will be dry enough to check the roots ...

So should I remove the moss? or just leave it? the moss hadn't been
growing until I started fertilizing.

The plant only cost me $20, I don't want to return it, I want to try
and save it ... plsu the I don't think the bonsai cart is there any
more ... even if I could return they'd likely just trash it ... it's
not a matter of money, as corny as it sounds I want to save the tree
....