Reaching my goal

I doubt that acting school is a waste of time. Certainly you would (a) learn skills and (b) be able to network with people who could potentially help you find work later. Plus you will need a resume, and acting in front of your family and friends is lovely but isn't going to be enough for your resume. You need to be in productions of one sort or another. Casting directors are not going to just hand you roles -- they need some indication that you can do the job. Going to school is probably the easiest way to get experience.

Oh and 23 isn't too old. Neither is 63. People of all ages are needed for parts. Most of the folks in the industry aren't the big, big, big names you read about all the time. There's lots of room for people to play all sorts of supporting stuff, and often someone who is not super-young is chosen for those roles. Things like playing a receptionist or a priest or a bartender.

Perhaps you don't have to enroll in a fulltime program but it can't hurt to take some classes. Not only will you learn something (and regardless of how fabulous you think you are already, there's always more to learn) you will meet people and be in a position to network. Besides, if you've never performed in front of an audience outside of your family and friends, how do you know you can? Getting up in front of an audience is not an easy thing for many, many people.