• Go to https://c19study.com/
• Click on "Early" to see only those studies that looked at early use of HCQ (before you need hospitalization)
• Pick a study ( https://c19study.com/risch.html is a good start, because it sets up "early" vs "late" use distinction )
• Click on "source" and share it in relevant communities. https://reddit.com/r/covid19 is actually pretty good, for general COVID19 science discussion, but they are mostly unaware of these studies.
• Don't share https://c19study.com/ itself (Don't give them an excuse to dismiss any study listed on that site, because the authors of the site itself chose to be anonymous (Very understandable))

I'd do this myself, but this needs to come from different posters.