Well, I did end up staining/painting my new painting desk. It was a bit of a cluster, lol. I first started out trying to stain the desktop board -- um...yeahhhhh....no one informed me you couldn't stain MDF board, hello!!? Looked horrendously heinous!
SO, I ended up spray painting the board satin black (bc that's what I had on hand) and then sprayed over it w/ a Matte Finish spray in clear. Then I put chalk on it and erased it off - and it ended up looking kinda like slate or something...I like it!!
Then I stained the legs as planned, and they turned out as planned, luckily.