"I can't" shouldn't be the end of the story. Don't stop your big idea, your passionate project, or your important work when you arrive at this chapter.
In fact, "I can't" is the point where the story gets good because "I can't" is the turning point when you stop looking inward and begin looking for help.
"I can't" is just a resting point before the big climax where the resolution is "but we can."
The end of your ability is usually the beginning of community.