You'll need to setup a YouTube channel (not just an account). Next create and upload videos. Look at successful channels and mimic what they do.
You'll get paid via ads through Google AdSense. Setup an account early. Once you reach the payment threshold you can request a payout.
YPP is a partnership between content creators and YouTube. You'll need to join this program to start monetizing your channel. You'll need 1000 subscribers with over 4000 watch hours in the last 12 months. Don't forget to follow the community guidelines.
Ads are one way to make money but how frequent will you place ads and will you make viewers watch the whole ad? Keep an eye out for sponsorships too.
Think about reviewing products then selling them to your audience through affiliate marketing. It's a great way to make a profit without creating a product.