It's kind of tedious to do manually, but you can use something called SteaScree to make the process SO much easier, especially if you're uploading in bulk. It's open source and works like a dream.

steascree.download

Thank you!

I'll probably end up rushing through everything over the next week just to say I did it (and because diamonds).

Ahh! Thanks so much! I wanted to try something a little different, and then I ended up experimenting with some light editing, too (mainly some eye highlights and sparkles because I love a good glitter bomb).