One of my go to looks is a cardi and a tee. It’s a perfect real mom style option. And check this out, you can get a Boyfriend Cardigan with open front style and big pockets, in a rainbow of colors- for as low as as $5.90 shipped! Each color is a little different in price, but they all look to be under $8, so get a couple!
Also remember that Amazon prices change unexpectedly, so check current price before purchasing (it might even be lower!)