you stupid bitch the type of setup you use depends on the type of content you make

post a clip of the format of content you want to imitate otherwise any suggestions are a waste of time

the most expensive piece of gear is the room you're in - most rooms are too small to get right camera focal length ... but that depends on your face type too ... if you have a big nose you can't afford to use short focal length but to somebody like Charlie Kirk actually a short focal length ( like phone selfie cam ) would actually look better because of his deformed head shape ...

my advise is just start doing it and change equipment as its deficiencies become obvious

the biggest lighting upgrade you can make is repainting your walls with neutral gray studio grade paint.

the biggest audio upgrade you can make is a microphone arm that gets the mic closer to your face without obstructing your face or getting in the way of your ability to use your hands to use mouse and keyboard etc.

all microphones from major brands that are specially designed for the task are good - the problem is people don't use them correctly, which for the most part means they are not positioned correctly, but also there is technique issues like not breathing into the mic etc.

for sound treatment you might want to try using anything made of foam or fabric and just fill the room with it, especially closer to the corners. just make sure the room isn't empty.

for light you can hang a white semi-translucent curtain behind the camera and hit it with some light to create a large softbox effect.