I've started jumping Sailor at my barn's cross country course. I'm not serious about competing---there are no jumping (or english, for that matter) shows where I live anyways. However, I'd like to improve. The problem we've been having is that Sailor gets excited oftentimes and will rush toward the jump, causing him to hit it with his hind hooves while going over. I also do not know how to lengthen/shorten his strides. As a result, Sailor will sometimes be too far/close at the take off.
All of this only happens while cantering. I usually trot Sailor as to avoid the rushing issue. I know several of you will want to tell me to get jumping lessons, but that is impossible for me. I know something like legthening/shortening strides cannot be taught over the internet, but I would appreciate any tips/help to point me into the right direction.