Question How to block unwanted content from my phone?

Dec 11, 2023
I have an android phone, xiaomi if it matters. I want to set-up a defense for my phone, so that:

  1. I can't view pornography in any possible form. No websites, no games, and not even "soft pornography" - things like "dating simulators" or anything like that. Not only on the web browser, I also wantnot to be able to download from the playstore any app that contains content like that.
  2. Block access to youtube or anyway to reach it.
  3. Possibly (I'm still thinking about it) completely blocking access to a web browser.
  4. I still want to be able to use everything else of course: navigation apps, bank apps, etc.
  5. I want to do it for free if possible.
  6. It is very hard, almost impossible, to remove the defense. So an app that i can delete any moment isn't going to do the job.
I searched the web for a good solution, but i'm quiet confused by all the information. If anyone knows how to setup such a defense that would be amazing.
Only thing that would work if you use an app and enter a password you can´t remember and tap blindly into the phone. Or you will need someone who will install all for you and doesn´t give you the password.