First read today's announcement http://www.flyertalk.com/forum/unite...ification.html

Second, For where you wish to travel, UA is probably as good or better than others.

third, Yes on upgraded travel you do continue to earn miles based on the original purchased fare.

Fourth, plan on educating yourself and a great place to do that is to become a regular reader. You can not learn/adsorb everything in a few simple steps. The way to maximize your experience is to learn the rules and then learn how to apply the rules best for your particular desired outcome. Learn how to use the rules to maximize your personal experience. There is not single template.

have fun, safe travels.