Hello! If you want to get better voice for sing then follow these tips.Hope it will help
Don,t use Cold Drinks because these drinks are not good for vocal chords
Always do practice of singing 1 to 2 hours a day daily.This will help you in gaining stamina.
Avoid Cold Water (Prefer Warm Boiled Water)
Eat Healthy Food (Avoid Oily Products)
Record Your Voice and Observe the mistakes
Be Confident and Ignore the criticism