Well the thing that made me have a lot of confidence and ride well , is helping down at my local stables, I learnt so much and I got free rides, which made me a lot better rider, the thing I you have to show your dad how responsible you are not just helping out when the weathers nice, or when fancing a ride, help rain and shine! You learn so much about looking after horses you wouldn't believe how much I learnt from just helping out and it gets you ready for your own horse one day and by showing you can have a horse and by the constant nagging you'll get a horse! Just like I did!
but the thing is I personally don't think you are ready for a pony of your own from considering the mount of things been said but just help out and soon you'll have a horse! Trust me it really does work, and you get free rides and make heaps of new horsey friends to hang out with! Go for it! If you really want a horse take my advise!!!!!!! Good Luck!