I take note of this date, and know that there is a huge possibility that 6 months down the line, I will read posts from you. God is the author of life and he alone knows when he can take it away.
Be positive, do what you got to do (e.g. forget the damn whiskies et al) eat a healthy diet, exercise remain at peace with your God, notice his miracles every day, inspire people. Remember its all in the mind. If you prepare to shut down in the next 3 months, you surely will. See beyond the 3 months. However, get ready for your transition just like the rest of us should.
You might know Ben Muchemi (Baba Ciru) a rally driver. He had/has stomach cancer, went to India for treatment, they chopped 3/4 of his stomach and intestines which were cancerous and he was given about 6 months to live. As I write, he is still doing safari rallies as a driver not as a co driver. Its not easy as he has to eat small portions as his stomach cant accommodate much. he is also extremely careful on what he eats just like the rest of us should be careful. Sometimes he vomits, doesn't give up and he eats again. Not easy but he is still at it and going strong.
As for the charity, I would advice you to write a will to donate to an existing foundation, a hospice or a well run but struggling children's home when your time comes. It would take too much of your energy to start thinking of starting up something now.
Am praying with you.
All the best.
Lord, thank you!