Most suitable way to make player move for an open world environment?

Hello, I am going to work on a game project and since, I am a beginner, I don't know much about unity. Till now I was using transform.translate() thing for moving the player. But, that method seems very laggy while making a camera follow it. So, I will like to get suggestions to make a controller script to move player in a more realistic way like that in premium games.