Q. How do I find an Open Access journal but avoid predatory publishers?

First see if the journal is listed in DOAJ (http://doaj.org). This isn't a guarantee that the OA journal is not predatory but it is a good indicator. You can also check to see if the publisher is a member of COPE (https://publicationethics.org/) or OASPA (https://oaspa.org/).

Analyze the journal to look for any predatory publisher indicators such as: receiving an unsolicited email, little or no contact info given, grammar errors in the text, false or misleading metrics given, scope of journal is extremely broad or inappropriate, promised turnaround time for peer review is very short, and information about fees or Author Processing Charges is not clearly laid out.  (See attached infographics for more details)

You can also check with colleagues or a librarian. Above all, use your critical thinking skills.