There are several free services that'll do it with a VPN, but you pay in terms of telemetry. So in that regard, I don't recommend them. If you want to change your IP out of respect for privacy, then there are a whole slew of things to consider right down to some configuration settings in your browser. Generally, you want to focus on a VPN provider that is located in a non-five eyes jurisdiction. Without going into too much detail, it means the VPN company is located in a country that is Internet privacy safe. Such countries are Romania, Switzerland, Panama, Iceland. And I'm sure there are others.
Two VPNs that I can recommend are VPN.AC and ProtonVPN. VPN.AC is located in Romania and ProtonVPN is located in Switzerland. Proton Technologies AG also offers pretty decent private and secure email that is
HIPAA compliant. They are are also in the works to release their own secure cloud storage this Fall I believe.
As to the speed of a VPN, that all depends on the server you connect to and what VPN provider you use. Here's my speed with the VPN I'm using now. Keep in mind that I'm in Colorado and making a connection to Canada.
Depending on what you're doing, and from the perspective of free, there's always the Tor browser. But! Anyone can create an exit node and sniff the traffic. And I know damn well the FBI and the NSA have their mitts in it and God only knows who else and what countries. If I even use Tor I use it with my VPN at the same time plus I configure Tor to use a bridge. That option can be setup when you launch Tor and if you do use Tor I highly recommend you use it.
Another thing. Sites that use a reverse proxy like CloudFlare (which this site uses and so do I) can outright block your VPN or Tor connection, present a captcha to that connection or a Java Scrip (JS) check in an effort to help keep bad crap from the website.
If you want the nitty gritty on VPN security, read my post here:
https://cyberpcforum.com/viewtopic.php?t=531