Is there any sir/ma’am culture in the college? Have heard from few that while some seniors don’t care about this, there’s also a few who impose this heavily upon juniors. If yes, how does one tackle this without getting excluded from everything in college? Is it even worth it to do worry about it? Anything else I should know about the student life? Thanks in advance.

Sir/ma'am thing is the least of the problems here. The entire ragging thing is a relatively minor problem at NLUO. Here, the biggest concern is getting dragged into mediocrity due to the crazy peer pressure to oppose any kind of seriousness or grind. You'll be pressured into partying or paying for freshers', farewells, etc. If you listen to the wrong seniors or batchmates here, you're fucked.

As a student from a recent batch of NLUO pre-2020 batches. I would like to point out some stark reality.
1. So the 2020 batch and onwards are the most detached batch of NLUO and its history. Although 2020 batch had the taste of some old seniors of 2017-22 and 2018-23 batch, but things wen spiral after they graduated.
2. 2019-24 is the batch that set a precedent of zero interaction with juniors and the most lethargic batch, which followed down the lane of upcoming batches.
3. VC changed the whole culture of how students interact with their seniors and juniors. This led to a situation where Student Council voice was shut and Freshers were overtly protected from even having a conversation with senior batches. This led to the extend wherein, there is not much of engagement between the juniors and seniors.
4. The inclusion of 3 year LLB was another blow to it. The first batch is the worst. A University of National Importance, decided to induct the first batch purely on the basis of first-cum-first serve. The worst decision to ruin just for some extra revenue. The result was expected. A group of oblivious and ignorant people who are more into student politics and creating rukus with the 5 year LLB. Even the first year of 3Yr LLB are more sad for their seniors.
5. The crowd at this point of time is more of self-engaged personality.

The culture that NLUO used to have been now gone.

It's been 2.5 years since I graduated but what I can confidently tell you from my experience is that this sir/mam system is the easiest method to know who to avoid for the next 5 years. Observe and comply for the first semester if you feel objecting to it is not worth it. The first semester break will make everyone forget everything and you will get to make a fresh start from the second semester onwards. Then ignoring and avoiding those identified seniors (who are more often than not good for nothing and hopelessly incompetent) should be the way to go. These identified people are usually the ones saying something like "if you don't address us in a certain way or do yada yada yada as per our instructions/ suggestions/ influence then "wE WilL not hElp yoU". Very soon you will realise they were anyway not in a position to help anyone. You will come back to this comment and thank me later.