It's actually the other way around. You improve yourself and the marriage comes after. The principle is that if you continue to do the same things that drove your spouse away in the first place, nothing will improve. However, if you improve yourself and learn about how R works in general, you become a better individual and if your spouse notices those changes or not, that's up to them.
Have you read the book? So many people come here thinking that this website is the answer to everything. It isn't. The basic fundamentals are all in DR and DB. Read those first.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.