How on earth do you figure 22 is old?!!!!!!!

Regardless, go for it. If this is your passion then follow it. My daughter returned to University as a mature student at 32 this past fall and she did very well. She had a far better experience this time around as she did the first time she went making a rather successful year of it. The reasons? Certainly age and maturity have a great deal to do with it. This time around she also has a plan, and knows what the goal is.

You have many many many years left to follow your dream. Take your time, be responsible, and that dream will be within your grasp.