Taking responsibility is a sign of maturity and a signal that you are ready for more in life. There are many forms of responsibility. There are numerous ways to take more on. There are all types of reasons and rewards for doing so.
Once you determine you want more and are willing to take more responsibility, you might have to go looking for opportunities. Some will find you through good timing and circumstances. Others will depend on you to find them.
Taking more responsibility can be painful. Tough it out. The wildflower had to first push up through the ground and grow through the grass and weeds before it could show its bloom. So it is with you and me. Our fruits sometimes come at the other end of taking on more responsibility.