Please excuse the mess... we are mid-renovation of this tiny bathroom.

I hate this shelving unit in our bathroom, it takes up the whole wall and there's barely any room for a mirror. I was going to take all of the trim off and cover it up with drywall, but my husband and I are terribly unskilled at finish work. I feel like it wouldn't be worth all of the effort involved. We're selling the house, so I don't know what will be more "appealing," to have it covered up, or have the available storage. So, if we kept the shelves there, how could I fit a mirror and close up the shelves so its contents are not cluttering the space? I just want this to have a neater appearance.