How to Massage?

[pj244]

Hello, I am 7 weeks post-surgery and I want to start massaging to get help reduce scar tissue around the incision area.
I've read on this site about how this is the right time to do massage, however, I am not sure exactly what to do for this.
A few questions I have are:
How long should I do this for each time and how many times per day?
When is massage no longer helpful in reducing scar tissue?
What time of motion should I be using and how much pressure should I put on the area?

Thanks very much to anyone that responds!