Hello! Thanks for joining, and I apologize for the late reply. When you land on our group page, there should be a blue place at the top of the screen that says "welcome home". Beside that, it will have an option to submit art.
After that, you can choose which folder to submit to! All of your art will show up, with the folders at the top! Click on the art you want to submit, and it should become highlighted! Then choose your folder and go down to the bottom and click submit!