Once you set a dumb goal and start pursuing it, you will find the job quite tough because it's a dumb goal. You may want to change the goal. You may feel like giving it up. It's very tough and it should be. You are aiming the ultimate goal that excites you. You literally trade your life with the goal. Because you want it.

It's totally natural to feel that way because you've never set a dumb goal. This is the very first time you get into unknown voluntarily. People don't do this and that's why you feel yourself dumb. But you are not fool. You are smart enough to understand how to grow. The only way to grow is to get into unknown even if it is scary. You want to do it anyway because you now recognize what really matters to you in life.