Wow... You are "getting this" fast. This is a most impressive result, Bobbie.
The face detail looks just right and I especially like how you did the edges.
A couple suggestions...
(a) Sometimes filters tend to exaggerate areas you don't want emphasized. See that black blotch on (I'm assuming) her forearm? Kind of distracting. I'm also assuming you've got a flattened image (background only) at this point. If not, create a new layer at the top of the layer stack, then (while holding down the Alt key) Layer > Merge visible. (This merges the layers into a single layer without collapsing them.)
* With the Lasso I'd draw a selection around that area plus a little extra. It doesn't have to be a perfect selection.
* Alt + Ctrl + D - Feather selection. 2 or 3 should do it.
* Ctrl + J - copies the selection onto a new layer
* V - to engage the Move tool
* Drag the new piece of arm over the black blotch
* Layer > Add Layer Mask > Reveal All
* Airbrush black on the Layer Mask near the edges to blend in the replacement area (switch to white to "undo")
* When you're happy with the result (it might take another layer or another selection to get it right), Layer > Merge Down will combine the layers.
(b) To me the combination of that bright green background and its texture are a little distracting -- taking focus away from our little star. Here's one approach to tone it down a little.
* Create a new layer at the top of the layer stack
* While holding down the Alt key, Layer > Merge visible
* Noise > Median and use a radius of 2-3. Don't worry if it looks like "too much."
* Layer > New Layer Mask > Hide all (black thumbnail)
* Set foreground color to white
* Airbrush with opacity ~ 40%, flow ~ 40% in the green background area. You don't need to soften it a lot, just a little.
.02 from the peanut gallery.
Far as I'm concerned, consider yourself a 101 graduate. Don't hesitate to try any of the other projects, challenges, etc. You're definitely ready.
~Danny~