I’m gonna go ahead and signal boost the living fuck out of this.
ALSO, Chrome has this feature you can add as an extension. It lets you right click on an image and find the source without having to drag the picture on the desk top or without having to copy and paste the link- it just saves time. There is also SauceNao, which I believe is solely for Pixiv sources?
also, to differentiate between the original and a repost: 1.) not always failsafe, but look at the notes (especially if it’s a popular piece, those usually have notes in the thousands) 2.) go to the source tumblr to see if they have more art of the same style, or if they have more reposts of art by different artists