Visit the Learning WordPress Forum for additional info, to post questions and receive answers.
To create a new WordPress post, login to your WordPress dashboard, and click the Posts menu, and click ‘Add New’ Post.
Next, you will see the ‘Add New Post’ window like this one below. In this window, you can add the title, add the post content text, add an image in the content area and/or set a featured image (which will be used as your thumbnail image when the post is viewed in excerpt format). You can add the post to a category or create a new category etc..
You can also add tags which are kind of like key words that a user would enter into the browser when searching for info. Tags will help your SEO. When finished creating the new post to your liking, click the ‘Publish’ button on the right. View the finished post, and if necessary, edit and update the post until satisfied.