Hello friend!
I have checked your profile and I came to know that you are a newcomer and you have not completed any of your achievement tasks, to participate in the community contests and more you must first verify yourself in the newcomer's community by verifying yourself through an introduction.
It would be great if you first complete your Achievement tasks and then post in the community because we only support verified members.
You can check the newcomer's guide from steemit team.
https://steemit.com/guide/@steemitblog/steemit-a-guide-for-newcomers
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Keep checking @steemitblog for the latest updates.