i am eight years old. now i start learning with my father help…
Welcome. It’s good that you are starting to learn to use SketchUp at your age and that your father will help you. Please have him help you fill out your forum profile correctly with the SketchUp version, license type, operating system, and graphics card. If that information is correct we can help you when you have questions. As it is now, we can’t.
Take a look at all the Sketchup tutorials on YouTube. You can learn a lot by watching them.