You could, sure, but you don't
have to do that to be a big help to people here. If you have some knowledge in a certain area that someone needs help with, offer that. If you just need to offer sympathy to someone who has lost a valued pet, do that. Just be part of the family. It doesn't have to be forced, just a natural thing.
There is a thread about the history of BackyardChickens.com that you might want to read if you're interested.
https://www.backyardchickens.com/t/9631/backyardchickens-com-history
If you read that history and see the name "chickchair", Cindi, who was chickchair (may she rest in peace, can't believe she's gone), was the admin when I joined BYC originally. It's an interesting read!