almost any horse can jump, if they are sound, and they trust you enough. before you jump your horse, you want to do a lot of ground work with trotting poles. once your horse is okay with them, make a very small crossrail, and just walk the horse over it a couple of times to make sure the horse isnt scared of it. once the horse is okay with the jump, start off with a very slow collected trot, and see if the horse will jump it. make sure to use pretty looose rein, so the horse will learn to stretch his/her neck over fences. once you are set with crossrails, (w/t/c over crossrails, and courses of crossrails) then raise the jump every time you ride the horse little by little. it all depends on the horse. some horses hate jumps, and some have problems in their joints and cant jump. just make sure not to jump the horse to high all the time, because it is bad on a horses legs. give her a break from jumping if she is doing well with training. make sure you are advanced enough to teaach the horse how to jump!
beautiful horse by the way!