That's not Creationism though. Creationism really is, there is no evolution and everything was created as is. You can have a Creator but not have Creationism- that's basically what I was taught when raised as a Christian (Genesis is at least to some degree metaphorical or a remnant of an older faith, God was essentially the First Mover, we shouldn't disbelieve science, etc.).
What you describe is more like Deism or Theism, where you believe in some sort of higher order intelligence behind the universe, but it's not incompatible with science and rationality and observation. You can't believe in both Creationism and evolution because Creationism is an explicit denial of evolution, and of anything but a literal reading of Genesis. But you're in good company, as you just described many/most of America's Founding Fathers, who today's Evangelicals would have lynched as heretics if they bothered to read their actual words rather than treat them as cartoon mascots for whatever they want to imagine America stands for at the moment.