This is what I was thinking as well. I also had and still have some jumping confidence issues and my trainer gave me a neckstrap. It allowed me to hold and pull and otherwise freak out without holding and pulling and otherwise freaking out via the reins and causing issues. I started with lower jumps as well and moved upt and noticed as I got more comfortable, I didn’t grab the neckstrap as much and still today I have it and sometimes grab it, sometimes don’t - depends on the jump and how I am feeling. It works great to allow you to freak out but not cause issues with your horse.
Side note, I had some issues trail riding and realized I was getting nervous and grabbing the reins (stems from her issue with the Amish being evil). As soon as I realized that, I started grabbing neck strap and what do you know…if I didn’t grab the reins, she didn’t read DANGER in my body language and was more calm…then I started to become more calm…and she did as well…and last time Amish buggies were on the road, we managed to stay in a walk (tense walk but not jigging, bolting or trying RUN AWAY) while they passed.