If you are just starting out all that matters is going in to the gym regularly and lifting some weight. 3x5, 5x5, or some complicated periodized program with a lot of accessories are all going to work.
That's why I recommend keeping it simple. Build the habit and build some strength. Once you've done that, you can get fancy if you find that you're really into it.
A better training plan gives you a chance of winning competition. Most of us wouldn't win no matter what plan we follow (at my age only drugs could make me a winner and those have side effects I don't want), we just want enough strength for general life and health. With those more modest goals 3x5, 5x5, or since something not as good still will get us there.
That's why I recommend keeping it simple. Build the habit and build some strength. Once you've done that, you can get fancy if you find that you're really into it.