The thing that happens next can be exciting. The thing that happens next can be scary.
The main difference between these two is whether you are expecting the next thing to be successful (exciting) or a failure (scary). There are some crossovers (too much success can result in fear as well) but not as much as you might think.
If you are starting something new and are fearful, start thinking in terms of how to anticipate success and work in that direction.
Have a great day!