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Is it already published? If so yes, but you can cross-post it to the community.

When you post to a different front end, that's considered a tribe. When you post to a Community it's a little different. You must publish directly to a tribe, but cannot cross-post to a tribe.

What front end have you been using? Steemit is more difficult to navigate. I use Steempeak and it's easier to navigate the steemscape. I only use tribe front ends to publish too, but not to navigate around.

Sorry it's a bit complicated. Are you on Discord?

I use Steemit. I've known no other way. I guess I have a lot to learn.

I'm unfamiliar with Discord.

Discord is the chat app most ppl here use to communicate. Communicating through comments uses your RCs which you need to vote, comment and post.