Being concerned about our on-line privacy doesn't mean that we have something to hide. What we do, watch, listen to, write, play and discuss on your computer or smart phone and on the internet is nobody else’s business but our own. We may choose to be open on-line, like to use our real name on forums for example, but it must be our choice, not a requirement.
The best way to ensure our privacy is to be aware of privacy risks, to limit what you share on-line, and to use open-source software and services as much as possible. Today, it is impossible to have total privacy, but there is so much we can do to limit corporations and governments snooping on us.
Now, this may sound paranoid, but it is important to avoid services from Google, Apple, Microsoft, Meta and the likes as much we can, because their services and software are closed-source, and therefore no one can independently verify what they do with our data. No amount of promises or slogans can assure privacy.
Following is a list of software and services I use to improve my privacy, and I suggest you to take a look, too. (Almost all of them are free.)