Just think if your confident your horse will jump if your not he won’t but that’s not the end of the world!👍😊
You should ride a more experienced horse to give you some confidence, jump small verticals or cross poles to build your confidence up
Start of by doing poles then cavaletie then normal
Start small and practice going around courses :)
Just be yourself and pretend your practicing just like any day. That's what I do.
Sometimes riding a different horse once over a few jumps will also help :)
Start doing a little bit at home, and little by little start going a little faster and raising the jumps. If your going to show I would say show in hunter or EQ first then do something like beginner jumpers.