Hi Manohar, welcome to the community! Sorry that your first experience was not great.
When new user accounts post, they are automatically put into 'moderation' to prevent spam on the site. Our team reviews the posts to validate if it seems the user is a 'real' user with real content. At that point, we unmoderate the users so that they can continue to use the site as normal.
It is not the best solution for new users, but it has drastically cut down spam content on the site to make for a better community experience!