Yes, studying nature only provides a general revelation of God and does not lead to any specifics about God.
In theology, general revelation, or natural revelation, refers to knowledge about God and spiritual matters, discovered through natural means, such as observation of nature (the physical universe), philosophy, and reasoning. Christian theologians use the term to describe knowledge of God purported to be plainly available to all mankind. General revelation is usually understood to pertain to outward temporal events that are experienced within the world or the physical universe. The definition may be extended to include human conscience or providence or providential history.
General revelation leads only to Deism or Theism. To get to more specifics about God would require special revelation.
Special revelation is a Christian theological term that refers to the belief that knowledge of God and of spiritual matters can be discovered through supernatural means, such as miracles or the scriptures—a disclosure of God’s truth through means other than through reason.
I would also add to that comparative religion since religions makes claims and one would need to choose which one of the religions makes more sense.
I consider the main source of special revelation in Christianity is the Bible, which of course this thread argues for its truthfulness and reliability. I would also add it argues for it without the need for any particular assumptions, specifically, the inerrancy of the Bible. And through the Bible, we understand what was the universe created for and the nature of God.