A comment on each of the questions you asked:
- I think we must consider the possibility that God did more than watch, that there was occasional direction — just as the Holy Spirit sometimes directs people in the church. Yes, much of the activity and history of the church appears to be evolutionary also, but the activity of prophets and dreams and miracles still occur.
- I think much of the early chapters of Genesis were designed to teach spiritual truths and supplant pagan myths. The first creation story, in addition to replacing pagan myths, tells us we are to care for creation. The second creation story tells us we are to take care of your families. The fact that the two creation stories have different orders and methods of creation tells us they are not to be taken as literal history.
- Certainly humankind has fallen, in that we tend to sin, but a fall with a fruit-eating event is not literal — just as we know that the first two creation stories can not both be literal (since one has man created after plants and animals and the other has man created before plants and animals).
- Sin is real.
- Sin is doing something that harms other people, creatures that God loves.
- It is difficult to say about the Old Testament, yet the gospels are meant to be read as history.
- Yes, you can trust the Bible. That doesn’t mean it is inerrant, but it is reliable.
I hope this helps.