Getting started on the Kegels now is a real good idea. The only time you do not want to be doing them is while the catheter is in - doesn't help to be working against a piece of plastic.
Once started, you will be doing them for the long term - backing off lets the muscles get out of tone, and you might leak again.
Every description I see is different, and each person will tell you to do different numbers per day, but the general principle is the same. Check with your Uro's office and see if they have a specific site or booklet.
As a start, look at this page on USToo:
If you have not looked at that site before, you should also check for a local chapter, and consider going to meetings as available. It helps to meet others in different stages of the PCa journey.
You have seen mention of Yananow.net - that is also a good starting point for "experience" questions.