If you've read my answers, you'll know why I think that young people shouldn't be attempting spells. I can't stop you, obviously, but I've lived a long time; I have seen the consequences (and even lived them) of unwise spell casting. Even when you are convinced that it is the right thing to do, sometimes it is not because it can affect you and others for a long time.
There's nothing preventing you from working or volunteering with animals - but you are even too young for that yet. Have patience, do your reading, enjoy your connection to nature and leave the spells for later.