Spend a lot time bonding with your horse. This will help you build a relationship and you will be able to trust your horse more. And if you and your horse trust each other confidence will come easily for both of you
I think this really depends on the person, but remember that you were the one who got yourself to where you’re at. You put in the time, effort, and with horses, money, to be where you’re at now. What I remember is all of the struggles with riding that I’ve faced and how I’ve been able to overcome them.