Those questions you posed are the same I posed myself when I left many years ago. When I left, I asked myself "Since I believed so strongly that these teachings were true, and now I find they are not, what else am I wrong about?" The answer to that proved to be that I was wrong about MANY things. And, I am still finding things I was wrong about. But I now have better tools/skills and more freedom to learn more, think for myself, and correct ideas and beliefs. And, maybe the one "good" thing about having had the JW experience is that you will, hopefully, be more critical and skeptical in the future.
When you leave the Organization, you will probably realize two key things:
1. That many of the things they taught you were not correct and...
2. That we (JWs) were not given good tools/skills to think about how to determine what is correct - i.e. critical thinking, logic, and evidence. What we got from the Organization is "faith" couched in an air of pseudo-intellectualism. The version of "critical thinking, logic, and evidence" the Organization claims to use (and we were taught) is nothing of the sort.
I think many JWs leave understanding item 1, but many do not fully appreciate how badly they are lacking in item 2. You will need to continue to equip yourself with facts, but more importantly, you will need to equip yourself with the thinking tools/skills to understand how to evaluate facts.
Enjoy your voyage of discovery. Keep feeding your brain.
On a side note, there is a really good/fun book called "Being Wrong" by Kathryn Schulz which has an engaging explanation on how our minds perceive being right and wrong. She has a TED talk you might find interesting - http://www.ted.com/talks/kathryn_schulz_on_being_wrong?language=en