Hey Grace, no problem, glad I can be of any help!
Well, you can insert images in your blog posts manually, as you have until now, but you can also try our other plugin called 'Editorial Assistant by Zemanta', which loads up as a widget in your create-new-post page and allows you to insert quality, related, copyright images from around the web. You can also link up your Flickr or Instagram account, so that you can insert them much more easier via your Zemanta widget.
Here's a link to our demo page, where you can play around with it first, before trying it out on your blog: http://www.zemanta.com/demo/
Let me know if there's anything not completely clear or if you have any more questions — I'll gladly help!