Does Proxy allow you to surf anonymously?

I have read that proxies do allow you to surf anonymously, but in one blog I read proxies keep your data with you and eventually sells later or use it for their own marketing stuff https://www.purevpn.com/blog/anonymous-surfing/ after that, i search for it and I found this https://www.practicalecommerce.com/Does-A-Proxy-Server-Keep-Me-Anonymous-On-The-Internet

My question is if I really want to be anonymous online (I’m a cyberstalking victim actually) so does proxy is the right choice?