CORE is designed for 4.2+. Some things are different. If you want to continue with 4.1 then you may want to follow this: https://cgcookie.com/courses/blender-mesh-modeling-bootcamp
Or if you’re totally new then go thru this first: https://cgcookie.com/courses/fundamentals-of-3d-mesh-modeling-in-blender
Just be aware that in 4.0 they changed a lot of hot keys. https://developer.blender.org/docs/release_notes/4.0/keymap/#Sculpt.2C_Paint.2C_Grease_Pencil
