As you improve you gain in self-confidence and in the knowledge of your own strength and ability. You also have the opportunity to learn more about training techniques and programs, diet and fitness by talking to other lifters and sharing information. Training with other lifters and using powerlifting principles will improve your overall strength and well-being without having to worry about competing. Try a novice competition if you re not sure. People have taken up powerlifting as rehabilitation after an accident or operation.
Women can particularly benefit after pregnancy or to assist in guarding against osteoporosis.
Lifters can train as little as three times per week, probably the same as you are doing now. Each session is between an hour and an hour and a half. Just good healthy eating.