1 Start with Doc 4444 the bible.
2 Get a good instructor.
3 Be patient in learning.
4 Observe carefully how other controllers are working & ask them questions when they are free.
5 Practice daily for an hour & not more.
6 Always have a positive attitude.
That's the recipe.
No books can teach you APP vectoring as it is a skill & an ART if done beautifully.