To begin using YouTube, just head over to youtube.com and use the search bar on the top of the page to find the required subject. Alternatively, you could just browse the home page. On this page, you can search the popular and trending videos, from Music, to gaming. If you wish to participate with comments, likes, playlists, or even your own videos, you need a Google account. Head over to google.com/signup to create an account. After that, just sign into Google, click the 9 dots in the top right, and then click on YouTube. After that, you should be able to input to the YouTube community.