The Great Plateau Sheikah Tower is the first tower you will come across and will set you on the path of reaching the top of the remaining ones. Completing this one is simple as there are no obstacles to get in your way like there can be in some of the other towers in the game.
The main story quest will guide you to the location of the Sheikah Tower in the Great Plateau, so you shouldn’t have any trouble finding it. If you need it for any reason, the image below will show you where the tower is situated in the Breath of the Wild game map.
If you are having difficulty with this tower for whatever reason, the video guide below will show you exactly what you need to do to reach the top of this tower. You may be unable to complete this tower right away. You will have to wait until the story pushes you in this direction. There is no real advantage in trying to unlock this tower ahead of time anyway.