For any significant achievements in life, you need to come out of your comfort zone and embrace change.
Our comfort zone is the environment that we are familiar with. Irrespective of how good or bad it is, we have a natural tendency to stick to our familiar environment, and resist change. Familiarity makes the environment seem predictable. In a predictable environment you can prepare for the worst and feel in control. A change in environment makes us feel helpless, as we do not know what to expect.
This discomfort is a natural feeling and it cannot be wished away. So whenever you plan to achieve something you need to consciously accept being uncomfortable during the initial phases. Instead of struggling with your discomfort you need to focus your energies on your achievements and in getting comfortable in the new environment.