If you were waiting for a sign to start something, this is it. Your time is now.
When there is possibility all around you, the question you have to ask yourself repeatedly, is what's stopping you from trying something new everyday. Because if you don't, you're going to take things for granted. I realised this a little late in my B-school journey. There were people from all walks of life having very unique interests and talents. Most importantly, there was enough opportunity to interact and enrich yourself in a way that will be very difficult to do once you graduate.
Now, academics and related activities rightfully have their place high up in our priority, however, we tend to look at extracurriculars in a very myopic manner, in my opinion. It's difficult to understand at the time that what we do non-competitively and for our selves goes a long way in ensuring that we remain balanced mentally. Personally, I was not someone who though of herself as particularly sportive or artistic, but I did play the occasional table tennis and was an amateur guitarist. Given there were more talented players, I chose not to give these two hobbies the time they deserved to polish my skills at them, not so I could win any medals to mention in my CV, but because it would have given me the opportunity to speak to different people and also give me the chance to expand my worldview, considering the fact that my mind would be constantly running over the few repetitive and narrow set of things I was thinking about all week.
The second thing would be the ease of using the facilities provided to us on campus. We think we won't miss it so much after we get into the gear of our corporate lives. The truth is, that the first few months are challenging for every fresh MBA graduate. We are an ambitious lot, and have a thirst to prove ourselves to our supervisors and peers. This leaves little legroom to focus on our fitness and the activities we used to take up to bring a semblance of calm and normalcy in our lives. We might need to book slots, pay membership fees, set up a specific time in our weekends, and travel to a particular place to make things work out. Now, this isn't impossible, it's just not as convenient to make a habit of.
As far as competitions go, it's a brave idea to take part in them if you have the chance, because nothing else will show you how to bond with your teammates better than inter school contests. I would suggest attending the contests even if your participation is very limited, since you would get the rare opportunity to interact and forge friendships with other B-School students, and those contacts may come in handy at later points in time, but that's not the primary objective.
There's more to life than being academically proficient, or relaxing with your friends as you see fit. You can study and socialise easily. Taking the initiative to pick up the one activity that makes you feel comfortable about yourself is the hard part. It takes focus and repetition. But it is usually music that can cut through your confusion, it's the moves of a game that can make sense of your world, and maybe even help you make the choices you've been dreading to. The point is, there are certain outlets for your creativity, and your mind will guide you to express it. Mostly, the mind knows when you need time to focus on yourself, away from all the usual noise of the day. That's when your art can save you, if you give it the patience it deserves.