Words of wisdom! nice post!
as far as the sourcing an image goes you either need permission from the artist or website it is from or use free/open source images from sites like pixabay.com
Once you have permission (if needed) you can create a Source Link by writing between brackets [source] and then you drop the image's URL between parenthesis like this: (www.whateveritis . com) make sure there is no spacing in between the brackets and parenthesis