First off welcome to the forum!
I have a few books for standup techniques and grappling, but I have learned that the only way to really perfect these techniques is to use them while training. If I were you, I would invest in a grappling dummie, they aren't the cheapest things in the world, but they can help you get the basic techniques down. But it is much more of a benefit to learn techniques on actual people so you learn how to transition and react to what someone else would do.
I hope this helps!