What's the difference between traditional freestyle and total immersion?

Tradition is a bit boring, and total immersion is more suitable for the public, but if you want to improve your grades, you should practice tradition, such as kicking and paddling with one arm. I became interested in practicing freestyle after seeing the immersion. Before I came into contact with immersion, I thought I would never learn freestyle in my life. So my personal opinion is that you can start with complete immersion, let yourself swim first, and then use traditional exercises to break down the movements and gradually improve.