Living Grounded: giving, is God responsible for sin and what are unintentional sins

Questions:

1. How do I figure out how much I should give?

2. My understanding is that God created everything so essentially He created sin and as a consequence brokenness in the world. Is this correct and how can we still see Him as good regardless of this?

3. In numbers 15 there is a clear distinction between intentional sin and unintentional sin and the repercussions for both. Is there any such distinction in the New Testament? Is unintentional sin somehow not as bad as intentional sin? If so, how might you respond to someone who might say they’d prefer to not know about some sins if knowingly committing them is somehow worse?