Of course a proxy will suffice, but most people using a VPN to watch some show dont even know what it is

You can do so, if your only goal is a different IP geolocation and you don't care about your data. But yeah, I wouldn't recommend it

Most paid VPN Providers will probably also sell your data

I don't quite understand what you mean. Of course everything you route through Opera VPN can be seen by Opera but it is still forwarded to the respective endpoint at which it gets in contact with your destination server thus changing you IP geolocation

Since it is free and its the Opera browser which isn't exactly known for good privacy, I think you should definetly not use it for privacy reasons. It provides a quick and easy way to switch up your IP location though

True, but if you only use it to alter your IP Geolocation its fine