Beginner here

Soccer used to be private with a request mechanism, but it's all public now with a 1 week old account and 50 posts limit. But Sports is a category, not a forum, so you can't directly post into that, just the forums it contains.

The rest of the sports category don't have any post restrictions. There's still the sitewide limit if there's links involved. Otherwise the account is confirmed and in the normal groups, so there's no obvious obstacle.

@Round tower Are you attempting to add links in your post? And what exact forum are you trying to post in?

That's not a forum, it's a thread in the Soccer forum, so the Soccer forum restrictions apply. Once you hit the 1 week age for your account, and a total of 50 posts, you'll automatically gain permissions to post.