From the posted piece Bush finished his studies and post graduate education in Rome.
Who knows. He did not build a crystal palace and tour the West as a motivational speaker. The posted piece indicates after resigning he did some missionary work and may continue to do so.
But the testimony was not to create a blog as some do, but to act on the commands of Christ.
It may not matter to you, but I'm interested in how people finish their course. I found this, but the links are dead.
There are many examples of people who receive an evangelistic message with joy, and they are paraded around as a trophy, but they drop off, fall away, and become something else as their journey changes paths. They use adjectives like "former" or "recovering" and are hidden from view even faster than they were paraded as a trophy.