Back tuck? i hate this 20 character thing....?

okay so i have my back handspring and roundoff back handspring. i just did my first back tuck today (with a spot) it was a really heavy spot but i mean it was my first time...i go to gymnastics...private lesson....once a week for an hour. how long do you think it will take me to get my back tuck? also im going to camp next week for cheerleading and i will do them there. the camp is for 3 days and i will have tumbling for about an hour.