I'm not a medical professional nor an expert on Kegels, but that's the program I followed. I had NS RARP at 70 about 21 months ago. I did 10 reps of 10 second holding slow Kegels, and then 10 reps of fast Kegels. I tried to do about 6 sets a day. It took me some effort to learn to do them and to build up to being able to hold them while breathing. At this point, the slow ones I do about 70% of max, while the fast ones are closer to max. I started doing them reclining, and as I got better I went to standing. I used Michelle Conway video's on youtube and found her instructions useful for me. I had the opportunity to do them for 3 weeks before surgery and picked them up again after surgery when the care team told me I could resume. I really don't know how much they helped, but I think they helped. I was never incontinent after surgery, other than minor releases as I figured out the new normal. I think the skill of the surgeon was the most important factor by far, but I do think the Kegels helped. Even though I was continent, when I asked the surgeon how long to keep doing them (at about a year after surgery), his response was keep doing them at some level to maintain my pelvic floor strength. So I continue to this day, 1 or 2 sets a day. Best wishes.
Here's one of Michelle Conways videos I liked: https://www.youtube.com/watch