ive purchased from this place a few times now (blue edition oil) - seem to help a bit with my back and improved sleep , wherever you buy from i'd say get the highest % CBD you can find and buy a sample size to try first.
stay away from the stuff that is sold now in most chemists as the CBD content is so low its should be in a naturopathic section.
https://cbdbrothers.com/product-category/cbd-oils/