First choose a post you will curate and copy the URL. Get back to the Edit Post page. On top of the content editor there is abutton.
Pressand the ExpressCurate curation dialog will open. Put the copied URL in the location and press . ExpressCurate will now load the page and prepare the content for curation.
On the left side you will see the images that are found in the page. You can navigate and choose the best image that will fit for curation. You can also choose the size and layout.
On the right side there is a content editor where you can collect the text that shall be curated. By default a couple of paragraphs will be put there. There are also other paragraphs you can curate. Drop a little part of the auto-populated content and press on one of the listed paragraphs.
The selected content will appear in the post's content editor.
That's it, you have just done the first curation.