Hello @yukinoh1989 , welcome to CG Cookie! You did great your first time using Blender and making the logo, good job 🙂
If you follow the “Mesh Modeling Fundamentals” course next, you will learn all about Edit Mode and the cool things you can do with it. There you will learn to shape basic objects (like a cube) into all kinds of unique forms, so that you can make everything you want.
Keep up the good work and have fun learning!