If you want to hold your breath for longer while swimming, there is no other way but to practice it in the pool while you’re swimming.
Probably the hardest part to dominate when you are a beginner, which is breathing and how it relates to the movements of the shoulders and head. Breathing is probably the most important factor that will make you change from beginner to advanced.
Important movements of the hands while swimming the crawl stroke. Tips about what it should actually physically feel like to swim properly. The best practices and most efficient movements.
Reasons why gliding in freestyle is better than swimming without it. Common mistakes in freestyle have to do with the reach. Learn to swim with less effort.