It doesn’t matter if you buy your steaks at the supermarket or a gourmet butcher shop. If you want to learn about meat, how to purchase it, what’s a good buy today, how to cook it, start a relationship with your butcher. These are the folks who know what you don’t and will be glad to help if you just ask.
My own local butchers tell me that customers don’t take advantage of their knowledge and experience. They come in with their own preconceived ideas of what a good steak should look like and end up buying an inferior product. A good steak is expensive so why not ask the expert who handles the products everyday what they think is a good bargain. You may be surprised by getting better cuts for less money.