You can create a New Post in WordPress in a several different ways. Both from the WordPress backend and also WordPress.com toolbar. From your Left Menu Bar click Post and you can on the Post Panel of WordPress. Click Add new and you can direct to Add New Post Page.
Like it says ' Enter Title Here ' so enter the title of you post. When you type the title of your post you can get the Permalink of your post. You can edit it by click edit button and enter URL name as you want. After it you have area for your post content. Here you can write whatever you want and also you have lots of options to customization your content like adding h1,h2,h3 tags, bold button, underline button, italic button, inline text and much more to customization your text in a beautiful manners.
Once you done writing your post you want to either published it or save it as a Draft. This is done in the Published panel appear at your Right side.