You probably enjoyed watching mixed martial arts on television which is why you want to get into the sport. Its not going to be easy so there are a lot of things you have to learn about submission wrestling as a beginner.
When you enter the gym, ask questions and find out what are the rules that you have to follow. This may include coming on time and addressing your instructor as Sensei.
Since submission wrestling involves a lot of sparring instead of repetitive moves like in Karate, pay close attention to what the others are doing so you have an idea what to do when it is your turn to go into the mat.
Once you get into the mat, the most important thing you have to do is relax because it helps you think when you are fighting an opponent. This will also prevent your muscles from being tense which slows you down.
Since most submission wrestling matches last for 3 to 4 minutes, you have to pace yourself because you dont have yet the endurance or the stamina to win a match like most professionals.
Being a newbie, you will be fighting other students who have been here longer than you so dont feel bad if you submit to them most of time. In...