Yes to have a mentor or someone who can enlighten you, speeds up your learning. What a mentor can do is to guide you, but the rest of the thinking you have to do it yourself. As such, critical thinking skills is something so relevant yet lacking in people these days.

To stand out, you not only need to know your project inside-out, but also your company & its strengths to capitalize on (to find solution). Think of it this way - with every problem you encounter, what are the possible solution(s) and each of its pros and cons? Any repercussion from making certain decisions? Anything else you've missed? Train yourself to think from all angles even if you're not the one making the decision ultimately. Then you observe the result from that decision and reflect on the learning as reference.

Remember, learning is not a square box. It's not only on-the-job learning but also outside workplace - when you talk to people, when you network with others, when you observe what competitors or friends do.