Honestly, the majority of key points to talk about can be found online from respectable sources (for example, this article from Johns Hopkins, though there are many others). There is a better than even chance he has shady looked up the “Is this normal” stuff himself if he has normal internet access.
From a social standpoint it’s going to be different for everyone, teenage years are hard and kids are often cruel. I’d advise to just be there for him on this front, but don’t be pushy. He is going to be moody, lash out sometimes, and act differently. That is all normal. He is going to want to push boundaries and get in trouble (rather do things that will get him in trouble, most folks don’t actually want to get in trouble). Give him safe room to explore who he is and to try new things without letting him fall down too hard.
Lastly, you say there are no trusted male figures in your life, but that doesn’t have to be family. Good friends can also fill that space. I have to imagine there is some guy in your life that could have heart to heart, even just with you to then talk to your son. It’s worth trying to broaden your expectation of what a trusted male figure is perhaps.
Agree 100%. Most of the former Plex users turned Jellyfin users I have come across did so better Plex was broken in some way for them. For me it was the general lack of care in creating/maintaining a good Apple TV app. Over the past few years it’s just gotten buggier and buggier with a lot of complaints on the Plex forums where devs would essentially stop by to say they weren’t working on any fixes.
Jellyfin doesn’t fix 100% of the issues, but at least there is active development on Swiftfin that showed a desire to fully support all devices.