我的理解, 我的翻译，微微从你的译文改了改，献丑，和你商榷。

You ask me when to come home, I am not sure yet.
Now the pond at Mount Ba swells, due to the bleak rain at the autumn night.
When we can be together in the future, trimming the candle by the west window of the home.
Let me chat to you about the rainy night of Mount Ba.