I just checked your account and I can see that you have created a Freelancer account. You need to have a Client account in order to post a job and hire a Freelancer for your project. You can be a Client and a Freelancer using the same account.
To create a Client account on your current account, please check out this help article for more information.
Let us know if you'd like to opt for getting assistance from our dedicated team, helping new client post their jobs and invite the best talent for their specific project.