We are not trying to be mean, but that plant really is not worth saving and budding out. That plant is not well, is incredibly tall and stretched with very few bud sites. What we are telling you is that even if you finish this, you are going to have virtually nothing. Why is the plant so tall with no leaves? What happened to all the leaves?
You have a good light and you have space. I would encourage you to do some serious reading on the needs of cannabis as it is not like any other gardening. If is a high energy plants and has some very specific needs and wants. There is a Sticky at the beginning of the Beginner's Forum with some links to some very good basic beginner books.