Definetly talk to your instructor. It is never ride to just ask her when she thinks you can be jumping. Maybe she doesn't know you want to.
You don't want to jump until you can safely walk, trot and canter with good rhythm (steady and balanced, neither too fast or too slow) and get into "2-point" or half-seat position, out of the saddle, and hold it for a few minutes at least while trotting and cantering. Ground poles are a great idea for getting your horse used to adjusting stride and picking up her feet...correct distances vary horse-to-horse. How tall is your girl? Does she have a big stride? For the average horse (15-16 hands, normal stride length) you space poles at 4'3" to 4'6" to trot over them (start with a single pole and then when she can easily trot and canter over it you can add more) and for the canter you usually space them at 9 feet. If she has a really big or short stride, though, you might want to add or subtract a few inches.
Also if you want to post a video here we can help you figure out what seems "off" about your riding.
Hope this helps! :)
He knows when you're happy; He knows when you're comfortable; He knows when you're confident; And he always knows when you have carrots.