I have been running lineageOS on my OnePlus 2. I liked it, but Lineage has stopped supporting my phone. There are two options that I have been able to find as replacements - postmarketOS and /e/OS. Any thoughts on those or other recommendation? Anything that gets security updates, is open source, and is functional meets my needs.
and also many people in the tech scene like to explain things if you show motivation and the desire to listen, read manuals and such things.
so good internet-search skills will get you very far in my experience