Easy give the bitcoin to your elder sibling to
Catch out since you aint 18 yet or you should keep holding it till you clock 18 OR Older right now bitcoin is bubbling..
And do you really think he will give it back once he knew how much the value of that bitcoin you just gave him?
I dont think so.
That is not a wise move.
Better just look for new options.
Binance though is giving a starter pack of 2 bitcoin withdrawals to any coin. Better look at their android application and it might come in handy.