>>first consider what you need a VPN for

If it's just to keep any sketchy Wi-Fi providers from potentially stealing your data - or, if you're using Wi-Fi at work, keeping corp IT from having a record - or simply access to servers you have at home, consider setting up an OpenVPN server at home, clients on all your mobile devices.

It’s more complicated than just buying a VPN service as your home internet most probably isn’t on a static IP, so you’d need to set up dynamic DNS - and you’d need to pick a firewall that supported OpenVPN. (I use pfSense, which is free firewall software that runs on x86 boxes - but if you have a Synology Diskstation, that also has OpenVPN which looks to be easier to set up. I’m sure there are many others).

I don't use a public VPN, but if I was going to pick one, I'd go for one based in the EU, just for the GDPR, which offers some protection.

As a sidenote, having spent some years in IT, we really, really don't want to bother with whatever-it-is you are accessing via corp Wi-Fi with your personal devices - just keep your bandwidth to a reasonable lever, OK?