"What's really involved here?"

Quite often, we'll kid ourselves about the real scope of something we agree to. It's critical to get clear on the real scope of what you're about to take on. How much work will it really take? How much time will that work really take?

And keep in mind Hofstadter's Law which says things always take longer than you expect. It's the accumulation of "one more thing" that adds up and quietly becomes overwhelming.