Welcome. You have a very sad story, and all too common. At least most of us here have been through the same, and can assure you that you will get through it. You will definitely go through a couple of very tough years, so stick around for support.
do my own online little business and pioneer
That is a good excuse to stop pioneering, you physically cannot cope, so will have to step down. You will be put through guilt trips etc, but just ignore it.
I still wonder if I'm not seeing something that seems so clear to other people... I wonder if Jehovah doesn't love me and that's why I don't understand these things, because he's not openning my heart to understand it. What if he's not openning my heart because I don't have the right heart condition. But, why can't other witnesses ever give an answer if it's so clear to them even if it's just me who doesn't understand it?
Your reasoning is how the Watchtower indoctrinates you to feel. An important part of mind control is the use of fear and guilt. Look at http://www.jwfacts.com/index_files/mindcontrol.htm as it will show you how cults manipulate peoples thinking, and the emotions normally felt on leaving. Now that you are examining things you will quickly see through the falsehoods of the Watchtower, and soon will find it hard to believe you ever fell for it.
jwfacts.com discusses in detail all the topics you raised in your opening post. The reason that none of the JWs can give you acceptable answers is because there are none.
What is normal is for a person researching the Wathctower Society to be amazed by what they are learning, and want to tell everyone - before understanding the power of mind control religions. Rather then having others grateful for the information you share with them, you will just make a lot of enemies. The thing I most worry about for you is your husband. If he supports you, you will be able to leave and move on, if he supports the religion over you then things will be very difficult. If recommend doing a lot more research. It is key that you subtly approach him over time, rather than confronting him.