Expert players can get fully chromatic articulation by using half hole & different embouchure techniques.
As a beginner, you will only be expected to play the basic lower Octave scale.
To prevent cracking or splitting, try to follow these basic guidelines:
1. Do not leave it in your car on a cold winter night, or a hot summers day.
2. Don't let it get rained on, or store it in a damp basement. After playing, wipe down any condensation from your breath.
3. Keep it in a safe place, away from dogs, babies & wrestling matches.
Remember: 'A flute on the floor is a flute no more.'