Improve your writing style?

I think it is a good strategy to finish the book first and then revise it several times with different focal points from the front to the back.

I can’t really report on this from my own experience, because I’m still at the “too finished” with my novel project. But I’ve been thinking about it for a year.
At the moment I plan the following revisions:

• plot structure, voltage arc
• Voltage in small: I tend to indicate too much of the action before I introduce it. I’ll break a lot of tension. It helps me write, but it’ll have to get out later.
• Writing style: I like the narrative style, but I intend to look at each section critically afterwards as to whether the “show, don’t tell” method would be better in individual cases.
• Language style: If the content is fixed at some point, word repetitions, fill words etc. are at the turn. I’ve already looked at the 10-point TÜV. I’m afraid of this revision. http://www.andreaseschbach.de/write/10points/10punkt.html

For you (minded word) may have other reworking priorities priority.
Maybe in one step, it’s all boring because it’s repeated or because it’s irrelevant to history.
In the next step, re-form the remaining boring places. Can you describe it more alive for all senses? Can the figures add more emotions or thoughts with which the reader can identify? Can the “show, don’t tell” method help? Usw…