I use Veepn https://veepn.com/vpn-apps/vpn-for-chrome/ . This is a fairly fast and secure VPN. As far as I know, free VPNs track you and sell your data. If you want a VPN for privacy, you will need a paid one. this is why I recommend that you use a Veepn. If this is just to bypass regional blocks on certain sites, then free ones may be OK.
I have used many VPN including ZenMate, Browsec, Setup VPN and lots of other and they all work very good but as a network administrator from Nursing Thesis UK you may get exposed to severe online security threats and it may open the door of many online safety loopholes which may leaves your privacy and other activities at the hands of nefarious individuals.