Depending on age, extent of surgery, skill of surgeon etc, it is normal to leak a month after surgery. Some men leak for a year or so before becoming completely continent. Some men never become totally continent.

Becoming continent is dependent on multiple factors. Strengthening the pelvic floor muscles is important but not the only factor (we have lost 2 of the 3 sphincters used to hold in the urine; now we have one just like women). Diet, hydration, and training the body to not depend (no pun intended!) on pads are all important. It is counterintuitive that drinking a lot of water will help with gaining continence, but there are 2 reasons this is true. If you start limiting your fluid intake your bladder capacity will shrink as the bladder wall is just a muscle. With diminished bladder capacity you will feel full with only a small amount of urine in your bladder which causes leakage. Also, more water dilutes the urine. Concentrated (yellow) urine is irritating to the bladder and promotes leakage.

I learned all of this and much more from an excellent book recommended by my urologist after my prostatectomy. "Life after Prostate Cancer" Ten weeks to continence by Vanita Gaglani available on Amazon. She is a pelvic floor PT who has treated thousands of men with urinary incontinence. Highly recommended.