Over the past 5 years I've tried 2 VPNs. I had issues with the first, Private Internet Access. I've had NordVPN for a little over 2 years, having just renewed for another 2 years. With Nord, no antivirus is necessary. I like it because it's easy to connect, disconnect, pause and resume service. Some sites will not allow connection using a VPN. I'm noticing more and more lately. Sometimes I can get on SF using it...sometimes not. All my connections are within the U.S. but for some reason, I can't connect when certain areas have been used. Netflix used to allow connection with Nord, which is one reason I chose it (plus it was at the top of Best VPNs list), but now it may or may not play when connected.
I've learned to recognize that when a site says "no internet connection" or "unable to connect" that it's probably due to the VPN. I'll pause it for 5 minutes (sometimes 30 if I'm going to watch video on a site that doesn't allow VPNs). But I've noticed that if I'm watching a half hour show and have only paused it for 5 minutes, sometimes the show will continue to play, sometimes it will buffer, according to which streaming site I'm on. I haven't enabled all the features they offer such as password generator and cloud encryption of files. Read about it's features and benefits here (keep scrolling down beyond the blue area):
https://nordvpn.com/
@Marie5656