You are 69, have a Gleason 6 and are being given 3 months to make a treatment decision, correct? I have no idea what your resources are or where you are being teated but you may want to get a second opinion. There are considerations such as where on the prostate was the cancer found that influence a decision to urgently treat. Obviously you just can't ignore it, but with a Gleason 6 a month deadline may put you under artificial time pressure. Here's something from Mayo that touches that topic.

Treatment selection can be very stressful so extra information can be very helpful. My 2 cents.