Do you really want to do it, or don't you. If you really want it, it doesn't matter that it will take a lot of effort to achieve.
Life is made of effort.
You're going to spend your effort doing something. Have confidence in yourself. You are up to the challenge of anything you decide you truly want to be, or have, or do. Yet the challenges you accept will give you the tools you need to overcome them. And in the process, you'll grow, and build, and create.