Are you old enough to start pointe work?
When you're young, the growth plates of your feet are still soft and can be severely damaged by the pressures of pointe work. If you damage your growth plates, your feet may become so damaged you'll never dance again!
People grow at different rates, and only a specialist doctor can say for sure when your feet are strong enough to do pointe safely. The average ballet teacher can't be 100% certain. A few may be ready by the age of 9 or 10 - but the majority of girls aren't mature enough until age 12.
So unless you can afford a specialist consultation - which most people can't - it's much safer to delay going en pointe until age 12. If you strengthen your feet and legs, improve your turnout and perfect your balance, you'll find you can pop straight up on pointe with relative ease when you finally start, and you'll quickly catch up - and probably overtake - those students who started earlier.