Press the green flag. That's all! If you want to learn some more about Scratch, copy and paste these links. https://en.scratch-wiki.info/wiki/ https://scratch.mit.edu/discuss/ I like to use Scratch because you can make lots of different projects. If you want to make games and projects, Go to Ideas at the top of the page. You can choose a tutorial to follow to make a project. Once you get familiar with the blocks in Scratch, You can make you own projects without tutorials. When you make you own projects, make sure that they won't hurt anyone in any way. Give nice comments to people if you are going to comment. You can also join studios and make you own!
