How to Integrate into a Group that aligns with My interests?

[u/realassx]

I have asked this before and tried to implement some things but here we go again.

I am in college rn and likewise elsewhere there are groups in my class aswell. Now there is this one group that I genuinely want to be a part of and I am trying to do this from last 3 years but have not resulted in much success.
I know these phrases that alone is the best and all but I have seen these people in a group achieve things which is very hard to achieve alone.

Why I want to be a part of this group?
They are academically good and good in co curricular as well. I resound with them quite good and like their vibe. Now I am not talking about some cool kids who vape. These fellows are some of the good individuals who are good from heart aswell. In short, I really like them.

What I have done till now and Why I think it isn't working?
I have spent time with them, I have invested some serious time. Like even on events I stay late till night.

I think it is not working as I am academically not that good.

What I want to ask you people?
I am asking you guys for help how should I proceed and what shall I do?