It all depends on the company you are going to work for. You will do your share of grunt work with any company but if they want you to do nothing but push a broom or take out trash then you are not learning. IMO smaller companies are good for apprentices because you are usually more hands on. By now you should have at least a basic knowledge of circuitry and how things work. The same thought process works in commercial. The biggest difference is you will be using different materials and installation methods. Don't be afraid to ask questions and if you show your jw that you are willing to work you will learn a lot.