I did a Google search on "Free VPN reviews 2020", which returned dozens of "Top N" reviews. Usually when I am evaluating something like this I make up a spreadsheet with suppliers as the rows and features as the columns. Then as I read the reviews and discover new features, I develop a much better understanding of the field or product. Let Consumer Reports become your best friend. The magazine does not evaluate everything, but when it does it is excellent. You have to buy a monthly subscription (about $7 as I recall) to access their recent reviews. PC Magazine does good evaluations also. Most major libraries subscribe to these knowledge sources, which you can read usually for free.
It can take a half day or more to develop a product or service matrix, and at least a day or more to let the most salient product features surface to the top of your mind. Don't be in too great a hurry, as you may have to live with your decision for a while.