Pretty much this. Get hold of your ego and be humble enough to take lessons from experienced people who have track record of delivering successful projects. It is imperative to get the basics right before being able to take on more responsibility later.

    "We don't rise to the level of our expectations, we fall to the level of our training."

Make sure you get as much training as possible before raising your expectations. It will be easier for you later when business expects senior output from you but you are under constant pressure on both personal and professional fields.