The straight shot or bowling down should be the first that should be learned first. It’s the easiest and the most consistent shot in bowling and most new bowlers uses this shot. These days, more and more pro bowlers are bowling down and in because it’s a easier shot to do.
The straight shot should be the first thing you learn but also learn how to hook the ball as well. Sometimes the lane will be dry and bowling straight will be harder to do so you will have to move from that spot on the floor.
So it’s good to learn other parts of the floor to have more tools in your tool box. Pro tip, most people don’t know how to move from that one spot so you have to learn how to move and bowl different spots on floor. But the first shot in bowling that should be learned is the down and in or the straight shot.