Here is an Android FOSS article https://androidfoss.com/best-custom-roms-for-privacy/, the article is about variants of Android.
Different users have different ideas about how best to live with an Android smartphone, inevitably with very highly networked software created by an Advertising agency.
Your device might not be the easiest to experiment on. You might consider a (cheap) phone with which to experiment or learn. Here is a thread Recommendations & Advice on Compatible Phones, you might also keep an eye on the Sell / Swap section here.