每日吃瓜

Hello, I have purchased an Australian willow tree cutting online. I can't seem to find much information on this type of tree but I believe it differs from a regular willow and is an behaves like an evergreen. It grows really fast, within a couple of months there has been very significant growth. Should I trim the tree within this year or do I have to wait a year? Also I live in climate 7, in the winter is it safe to keep this tree indoors or should I buy a portable greenhouse for it outdoors? Thank you very much, below are a couple of pictures of the growth between 2 months