You should find everything you need relating to the options available for working with images in the text, in the user manual PDF, §15.5, Inline Images, starting on page 217. In essence it is no more complicated than any other word processor: you just drag an image into the text editor where you wish it to be. If you do have a lot of high-res work though, you might consider using linked inline images (§15.5.3) so that the bulk of the image is kept outside of the text editor.