The rat helps a lion
Even if you are small, you have very less experience, you can take a big leap, Unexpectedly bigger leap.
You can be the rat who freed a lion out from the hunter's net. And earned his friendship.
You have to know your strength, your unique ability. And then find the person or the place which needs you.
Every problem is a chain of smaller problems. Somewhere in the chain one link is missing or faulty.
You can offer to mend that one part with your unique capability. And you prove to be the solution.