I struggle a little with this too, and something I do that kinda helps (not sure if it'll help you or if this is viable) but I (have read receipts turned off) and leave texts until I'm in a mindset to focus on them. You can make whatever excuse you want to explain it, but that might help the zoning out—like when you notice yourself starting to zone out, leave the conversation if you can.
I don't have much more than theoretical ideas because I see squirrels all over the place but here are some ideas: if you're doing something you need to focus on, turn off/remove any distractions you can: set your phone to do not disturb, clear the space, etc. Also, if you catch yourself getting distracted, intentionally turn yourself back to the task, which can help your brain learn to focus more.
Um yeah I don't have much help here, all the people I know have such different senses of humor that I just code-switch to match their humor. Sorry.
Same. Something that helps me when I start feeling like that is to think of/be around the people I know for sure I've positively affected and to whom I can be certain I'm worth something to. (Kids are best, whether siblings or students—they're the most honest)
Uhh kinda hope that was helpful...but also Mirker will show up at some point with a lot better advice