Am I progressing too slowly?

I have been riding for about 3 1/2 months now. I have went from being able to walk, to being able to canter a small course of x-rails. I have only jumped a few verticals, which were 1 1/2 feet. I can now w/t/c confidently, and w/t without stirrups confidently (I cant canter without stirrups, but I can canter bareback) I can trot and canter over jumps. But I am consistently jumping x-rails, I thought by now most riders would have progressed onto courses of verticals by now? I think i'm progressing too slowly.. I only get 1 lesson a week, maybe I should dig up some cash and get 2 per week? I would love to be able to show 1m+ by next year. Thanks in advance.