More Questions about Krishna

I've been told that one cannot convert to Hinduism; that they must be born into it. Is this true? There are so many different religions out there, each having their own scriptures and teachings. How do I tell which one is correct?

I practice devotional service regularly, but still from time to time, bad things happen to me. When they do, I can't help but blame God. 'Why do You put me through this? I thought You're supposed to relieve my suffering?' I know I shouldn't think this way, but I can't help it. What should I do?

The Vedas declare that man has imperfect senses and a tendency to commit mistakes. That being the case, how can we accept the Vedic texts themselves as fact? How can we accept Krishna as God when no one has actually seen Him? How can the Vedic texts be authoritative when they were written by flawed human beings?

Don't the moon landings and other scientific discoveries debunk Vedic science?

I believe serving humanity is the best way to serve God.

What should I concentrate my mind on during chanting?

How do I concentrate on devotional activities when I have so many pressures to maintain a family?

When Krishna says to surrender unto Him, is He referring to His sach-chid-ananda vigraha or to the embodied being who appeared on this earth and then left, or are they both the same?

If everything is made from God and we have a tendency to enjoy like Him, why can't I enjoy all of His creation? Why should I have to avoid specific things like drinking and gambling?

Do you think that by worshipping a God figure, you're separating yourself from the single, divine-unity? Couldn't it be that the worshipping itself is the barrier to attaining that state of transcendence; because it - worshipping - is an action taken in attempt to attain that state of total-love, and thus, a non-pure form of being?

Where is the empirical evidence to back up the claims of the Vedas? How can we test that reincarnation exists and that Krishna is a real person and not a mythological character?