To create a new post, you only need to open Post > Add new from the left main menu and use an authoring form.
Fill the title as post title, you can use html tags to format title for example <i></i> to make it Italic
Use Visual or Text editor to create a content of your post. Use More button to separate excerpt/summary from body content (button will insert a horizontal line (in visual editor).
Set language (EN is default) in Language box
Set Publish date in Publish box (or use a Publish button to make post visible immediately - when you are ready with your post).
Use Category box to classify post - more categories can be used. Post will be shown in selected categories. If some categories missing, you can use Add New Category link under list of categories, or better use Categories link in left main menu under Posts item menu.
Use Featured image box to extend post with main image.
It is very important make image aspect ration in 16:9! You can prepare you image before upload or use
CROP function in WordPress.
Use boxes to tag your article in the appropriate tag groups (Models, Model ranges etc.) If some tag is missing in the group. You can add tag by typing in to the tag entry field or use left main menu under Posts and click to tag group you want to manage.
Select post format from the Post Format box. BNR support Standard, Quote and Video. Post format will change post visual appearance on frontend.