why do I get an error?

hello, i am fairly new to posting messages and links. can i not post a links to my youtube channel in here? i am posting on a new name, my email got hacked. thanks!

Users with a post count less than 10 have reduced permissions and higher scrutiny on their posts. This is a measure we’ve implemented to reduce spam. Once your post count is greater than 10, you should no longer have a delay in seeing your post appear.