You need a team for this kind of job, audio, video, camera, mic, editing, ideas, location, what kind of content, people that you need to interview and make video with.

For the computer, I think it's best you get an i7 with 16gb ram. Or maybe a macbook pro, try find an used i7 + 16gb ram gaming PC.

A friend of mine also a local youtuber, got pretty decent subscriber. Check his channel out -> https://www.youtube.com/@qartelTV