All of us are different. Urine test strips don't always work; more accurate is the blood kit but also more expensive and you have to prick your finger. Some people go into ketosis at 50 gm/day of carbs, some need to be at 20. When you go into true ketosis, it may take a couple of weeks or longer to adapt and you may see your performance dip for a while. Also ketosis is usually better for endurance sports, less good for high intensity sports like pole vaulting although I don't know a better way to lose weight if that is needed.
See Dr. Peter Attia's blog: eatingacademy.com. Also a couple of books: The Art and Science of Low Carb Living and The Art and Science of Low Carb Performance. Volek and Phinney are the authors.
It's not just cutting carbs; there are a lot of other considerations like sodium, the right amount of protein, good fats, lots of things.