If you’re not confident neither is your horse. Horses feed off each other’s emotional reactions to situations and environments. If one is unsure the look to find a confident herd mate to help them learn about this new thing in life whatever it may be. Horses are curious but they immediately expect the worse. They basically live on a “guilty until proven innocent” way of life. This keeps their guard up so they can react faster and thus, usually saving their lives in the wild. There’s no second chances in the wild. Only the strong survive.
Some wonder why their horses spook more under saddle v.s when they are on the ground. This is because they feel the riders lack of confidence so they think they’ve got to be on the lookout for danger. If you’re confident your horse will be too!