Tips for book writing?

OK so I'm writing a book for the first time and I have done brainstorming from chapter summary to little bit about the character. I have been just writing and seeing where it takes me.
1 What do you do to get in the writing zone
2 How to conquer writing block
3 After the draft stage where to from there - just because you have the main idea and then you be like OK what next in this huge book
4 anything else you wanna share that can help please do say.
Anyways I don't know if I will be an author but the goal is to have fun and at least publish this one book I got cooking. Thanks in advance
Tips for book writing?
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