I've used a VPN on my iMac before. I tried NordVPN, which a lot of people use. It was alright, but sometimes it slowed my internet, which was annoying. Also, I wouldn't say I like to spend too much money on stuff like this.
You can find VPNs where you can pay for a month and then stop if you want. That's good for trying them out. But, honestly, I switched to the proxy after using the VPN. I use one from proxys.io now. It's cheaper and doesn't slow down my internet like the VPN did. It works well for just surfing the web and watching shows from other countries.