A new novel

Now that my first novel is ready for publishing, I have moved on to writing the next one. I actually started work on this several years ago, before putting it to one side. Re-reading it, I can see that a lot needs to be done.
I did a lot of research while I was writing the novel and, unfortunately, too much of that went into the novel. Most of it does not advance the plot and so it will have to be cut.
The female characters do not have much to say for themselves. I shall have to strengthen their roles and let them speak out more.
In the original text, I set down what the characters said, but did not explain why they said it, or their moods.  I will have to go back and add all of that.
It is all going to take longer than I first thought.