How to improve based on orchos tzadikim and mesilas yesharim? Understand what they say, take what they say seriously and undertake to try and improve. Pick one middah and try and work on it, say for 2 hours a day, and build from there.
When I was a bachur in yeshiva, coming on time to davening was not an area where I excelled. On the advice of the R’Y, I chose one day a week that I would always be in the beis medrash by 7:40 (start time was 7:45). I chose wednesday (after much thought out and reasoned analysis). It wasn’t easy, especially during bein hazmanim, but I made it an entire year without being late (I had my shirt tucked in most days!). I added a second day and so on. It works this way with everything. Get angry? Decide that from 10-12 tuesdays, you won’t get angry. It isn’t easy, but
It grows on you and gets easier with time.