Atleayt they should make the setting to enter a slower updating channel user friendly. That's how I used before, with slower updated channel and deffering feature updates for a year and making security updates install on saturday's when I don't have to use my pc for productive tasks.
There is actually a lot more search engines that you might think, plus there are privacy frontends for them you can aggregate.
Edit: Also the main poin't of searxng is to use it as a proxy for them which hepps if you use an instance with multiple users, or host an instance for you and your friends for example.
All you need to do then is to reinstall the system if you can access the bios, I have seen there is another comment that names you the steps needed so please reffer to it.
for that I need to know gui codding and code the program it self, in terminal I just tie a few commands together and be done with it.