it's pretty easy. I have two, actually, and both are just point and click to connect. NordVPN is the newest one I've added, as it is higher speed and gets good reviews. I paid for the service as I have read some horrific reviews of the so-called "free" VPNs. It seems to be working really well, but I want to travel a bit more with it before I drop the second VPN I had in place before trying NordVPN. The second VPN is Tunnel Bear, which is the simpler one, again click and connect, but it also can be set for "automatic" connections any time I am NOT in my home network so I don't have to remember to use it. I'll probably drop TunnelBear in a few months after I've gotten more experience with NordVPN. You don't really need two.
To make it work, you sign up for the service (you can do monthly if you just want to experiment, but it's cheaper if you sign up for a longer term), install the software, click the country to which you want to connect and it's done. You do have some indications that it is connected on the top bar, so you know what the status is. TunnelBear can be configured to connect automatically if not in the home (trusted) network, which is handy. NordVPN doesn't have that feature that I can find, so I have to remember to use it when moving about, particularly on my iDevices.
https://nordvpn.com/?utm_expid=.flvu5xa0TfmDCLn-DcHS_w.0&utm_referrer=
https://www.tunnelbear.com