Trajectory is all about how you control the face. Figure out which lunch angle works best for you.
Control of the club face must be gained before speed is introduced. Practice different techniques and find which works swing works best for you.
Your wrist plays a hige factor in trajectory. Learn how to get your wrist working the right way.
When I started playing, I was taught a concept that hurt my swing. Stop twisting and start getting your wrist working.