You’re already doing a hard thing
Everyone is used to their own kind of hard. For some of us, it is the intensity of athletic training or the discipline of staying in a creative process. For others of us, it is the suffering that comes from enduring the stress of resisting life and not taking action toward our potential. All of these things are hard, and you get better at tolerating the challenge of the thing you practice.
This is good news because you are already great at something challenging, and if you can adapt to one kind of difficulty, you can also adapt to another. We are all better at tolerating difficult experiences than we think we are.
What if the new thing isn’t any harder than what you are accustomed to? What if it were just new?