Your article is pretty good, but you should really add the sources of your images to your post. Definitely make sure you also have rights to use those images commercially.
Not that I personally mind, it's just that you could get in serious legal trouble if you don't follow copyright law. Especially since everything is stored on the Steemit blockchain.
Thank you for the tip. Are you positive that the disclaimer in not good enough?
The disclaimer was what prompted me to write this response actually.
You mention that you don't own the rights to this image, yet don't list any source or give any credit to the author.
Thank you. Image sources updated as per your tip! : )