Welcome to BettaFish.Com, Kathy!!
If I were you, I would go to Pet Shop B. It's better to get a healthy betta at first, instead of one you might need to nurse back to health. Also, look for a male that has fins that looks like a female's. That is a younger betta. They can live up to five or six years, but they usually live about two years. Big, colorful, and "flashy" bettas are already about a year old. I'm glad that someone that cares so much about their fishes' health is joining the betta community!
Sally, I will always love you. You were my babygirl and the gateway to my bettabug. Thank you.