(I'm a US native speaker). To me, the most natural word would be "advice." "Advice" and "guidance" are considered synonyms and the meanings overlap.
However, for specific, precise details on small things I would use the word "advice."
"Guidance" carries the idea of somewhat general statements. "I can't give you specific advice because the tax rules haven't been finalized yet, but our guidance to clients for planning purposes is that they should assume mortgage interest will continue to be deductible."
I can imagine walking into a store to buy something I'd never bought before and saying to the salesperson "I'm not ready to make any decisions today, but I'm just looking for some general guidance."
"Never use more than 30% of the available credit on your credit card" is advice.
"Do unto others as you would have others do unto you" is guidance.