If you open up Plan Outfit or CAS, you'll see your sim pop up and then a little block at the bottom with its picture. If you click on that little block - you should see a bunch of little "symbols" appear, you want to click on the one that will say "Share" (it looks like a light bulb). Once it's shared, you can open your launcher and then upload it under the Uploads Tab
It should then appear on your My Page
