I like Systematic Theology but all it tells me is that God is faithful and systematic

Will we be able to say at the end of our lives, “I have kept the faith”? Not just, have I held fast to a body of doctrines. That is not all that Paul meant. But more: have we lived by faith in future Grace? Not just for a moment, or year, or a decade, but all the way to the end?  -John Piper; Future Grace

 We will not say, "I have kept the doctrine", or "I have believed the confession", both important things.  So each day, as we learn the catechism, study the Confession, learn systematic theology remember that it's not for a test that will happen on an unknown date for you.  You are learning these things so that you keep the faith.