Do you have any advice for someone that wants to start making YouTube videos?

Just start doing it. Use whatever computer you have, your headset and the free software out there and do it.
Once you've started, worry about improving. Get better gear. Learn new skills. Visit subreddits and websites dedicated to YouTube. Study software tutorials. If you want to get good at it, you'll need to put in a lot of time. This isn't a job you can start part time until you find success. Forty hours a week is part time. If you love it, dive in and just do it.