Your channel is your personal presence on YouTube. Each YouTube account has one channel attached to it. A YouTube account is the same as a Google account, and creating a YouTube account will grant you access to other Google products, such as Gmail and Drive.
Create your account or use your existing one. Add keywords to help people find your channel. You can add keywords by navigating to the Advanced section of your Channel Settings. Make sure that your keywords are relevant to your content.
Your user name can also work for or against you. If it’s short, easy to remember, and original, people will be more apt to remember you. However if you are using an existing account, just stay with it. It doesn’t help if you keep changing accounts.
You can setup Google AdSense for free at the AdSense website. Click the Sign Up Now button to begin creating your account. You must be 18 years or older to create your own account. If you are younger than that, you will need an adult to help you.
You need either PayPal or a bank account and a valid mailing address as well as other information so AdSense can verify who you are and who to send the money to. You only gain money per ad click and a smaller amount per view but it adds up over time. This is why having an audience is key.