Q1: I have tried streaming with one monitor and my phone to see how things are on twitch but my mobile app doesn't show anything but black so I can't tell if something is being recorded from obs and what's working and what's not how do I stream with my single monitor if I can see what's happening on stream for twitch pov?

Q2: I'm low budget 50 and under and need over ear headphones fot my pc I was told corded is best but all the ones I see want me to have that audio box thing[can't remember the name] or plug directly into my pc and I don't have a lot of room for all of that and the other issue is they come with mics and I already have a mic and last I've used headphones with a mic audio would be doubled [I was able to turn off the mic part and it still happened] I have speakers with a spot you can plug headphones into but not many headphones say you can do that.. what do I do and what kind of headphones could I use? I can't use Bluetooth with a dongle or dongle headphone connections in general because I don't have many working dongke ports or space in general.

I'm not a tech guy so a lot of stuff I don't understand

[I've looked at Fifine since that's my mic and I don't know if I can use any of them ]