You have a laudable aspiration. You know that you are setting yourself an ambitious target and that, to reach it, you will probably have to give more of yourself than you would ideally like to. So you are kidding yourself that it is going to be easy. Yet deep down, you are not so sure. How about deciding that it is probably is going to be hard and then resolve to carry on anyhow? For there are some things in life which are truly worth striving for. Your current idea, plan or project is one of these things. Give it your best shot.