As obvious as it sounds, I strongly recommend shopping at a specialty bike store. They are the experts, and they will be able to help you decide which bike is best for you.
But I think traveling around and going around the world and making arrangements for moving around is the most difficult thing, 'cuz you don't know what's going to happen.
There are any number of people who profess to be good Christian people who are willing to believe all kinds of things on suspicion. Now that is not the way the Bible directs for Christian people to do.

