To early to be jumping my pony?

hmmm. i would work her on flat for a good bit longer.. do lots of circles and lateral work to improve her bend u could introduce poles such as trotting and canter poles and get her thinking about what she is doing with her feet. how long has she been broken? most horses start jumping at 4 but that is after a lot of preparation before hand on the flat. also you could free jump her in a school, not too high with a max. of maybe 3ft just so she becomes used to jumping. it will take some time though. good luck. Also i would recommend you have an experienced rider or trainer there to help you and insure to take everything slowly. There is nothing worse then ruining youngsters by doing too much too soon.