Q. Which databases have peer-reviewed / scholarly articles?
While you certainly can look at databases individually, it's much easier to search across multiple databases at once.
Start with a Quick Search on the main page. Type in your keywords and check the box next to the 'Scholarly/Peer Reviewed' limiter. (Selecting the box next to 'Full Text' is also advisable.) Searching this way should return *only* those articles that are scholarly/peer-reviewed.