Here is a fairly stuffy report on CBD by the Mayo Clinic that just covers the basics without a lot of additional info: https://www.mayoclinic.org/healthy-lifestyle/consumer-health/expert-answers/is-cbd-safe-and-effective/faq-20446700
Not sure if this site is MSM or a cleverly disguised alternate health promoter. The big takeaway from this site are a list of things it seems to be good at treating, and mention that any treatment mechanism is not actuallly known: https://www.verywellhealth.com/cbd-oil-benefits-uses-side-effects-4174562
This article claims to be a roundup of "evidenced-backed" health effects and also side effects: https://www.healthline.com/nutrition/cbd-oil-benefits?c=206704570355
This "Harvard" article promises to explain "what we know and what we don't." But it's from 2018 back before legalization. https://www.health.harvard.edu/blog/cannabidiol-cbd-what-we-know-and-what-we-dont-2018082414476
A compelling lead line from this NYT (i.e. paywalled) articles asks "Does it help?": https://www.nytimes.com/2019/10/16/style/self-care/cbd-oil-benefits.html