I second that. I also took proper swimming education in my twenties, and followed up with this technique. Once you get the hang of it, the stable, long distance rhythm you can get is amazing.

Side note: learning to swim, full technique, is something you can do at any age, very rewarding result wise[1]. Kudos on your decision.

[1] Except if you have some hard to overcome fear of water. It's not a roadblock, but expect it to take time.