Welcome,
Most of us here have been through what you are going through and know how difficult it is, especially at first. You will find a lot of support here.
You comment on blood is very wise. The blood issue has changed considerably, and for legal reasons will continue to change. The early Witnesses realised that eatting blood is acceptable scripturally and hopefully this is one unnecessary restriction that will soon be removed.
I used to be in Bethel and it was there that I realised that the organisation is not well run. It is just another company, with all the good and bad that is part of any company. I found it showed no evidence of holy spirit. Funnily enough a friend of mine found being there faith strengthening because 'only something directed by God could continue to function when so poorly run'. The reality is that there are many religions that are as loving, as moral, as well directed and experiencing similar growth. This is not proof of being Gods organisation.
In answer to your question, no one knows 'The Truth'. There may be absolute truth, but no one can prove what it is. That is why there are so many religions. There are many people sincerely looking for truth, yet they all find different religions to go to because of it is impossible to know what absolute truth is. A persons religion is more related to circumstance and culture than anything else. It is unfair to say that anyone not belonging to one small sect is worthy of destruction by God.
What is the way to live? That is an individual question. But looking to the bible you will find that for the first half of human history there was no organisation. The men of old served God without knowing his name, without a bible, just knowing and loving their creator. Even in Christian times there were small groups of people meeting in homes. Jesus said where two meet together there his spirit would be. It is a very different concept to that of The Organisation being necessary for salvation. The concept of a leader or Organisation coming between God and an individual is the basis from which power hungry people have always manipulated others.
Check out www.jwfacts.com for a few things to think about that may help.