Are there any community-driven initiatives or ideas. If yes, is there a particular section of the forum where the discussions happen? I understand that there are even sub boards in a child board where activity is higher than some main boards. The forum is somehow broad.
You will probably need to be a bit more specific about your query. As said by @348Judah, things about or related to this community (forum) are posted and discussed mainly in the Meta section, but we are not sure if that is what you are asking about because the word community can refer to any community in general, and this is why I said you need to be a bit more specific about your question for us to be able to provide a more relevant answer to it.
Alternatively, you can visit all the sections and sub-sections of the forum and check everything out yourself. I know the forum is pretty broad, but it's not broad enough for someone to not be able to surf around it by spending some time and believe me, you will enjoy it if you have a hunger for knowledge and if you love reading stuff. Just keep surfing through every main board and then the subboards in that board, read the titles, and maybe open and read posts where you find the title to be of your interest.
I used to do that when I was new in the forum. I learned almost everything about this forum on my own, if you believe me.