Dear Lisa,
I read your problem that you can't save money. I also faced this problem and I think that could help you save some money.
A,K, Lisa still not an adult you can't open a savings account in the Bank. Therefore, I suggest you give the money to keep parents or friends (whom you trust) and when you need money you can take.
вариант 2 ( helped me raise some money) is to buy a piggy Bank, but only where there is one hole for the tossing of coins. Set a goal that would break the piggy Bank when it is fully filled. If you buy the bigger piggy Bank you'll be able to save more money.
I hope that one of my two councils will be able to help you. Write me a letter if one of the tips have helped you save some money.