I'd like to try layering a trendy bustier over a thin T-shirt, but is there something good for a beginner?

Standalone bustiers aren't in the data, but there are all-in-one T-shirts and 2-in-1 sets that let you pull off a layered look without worrying about styling. hmmm, for beginners, designs that give a bustier or corset feel without the hassle of matching separate pieces are easy and approachable to start with. I've picked items ranging from sets that include a sleeveless top to T-shirts with attached camisole or corset details.

I've picked a 2-in-1 item that comes as a set with a long-sleeve T-shirt and a ribbed sleeveless top. It features a ribbon knot detail on one shoulder of the sleeveless top and shirring on the long sleeves, and each piece can also be separated and worn on its own. Two colors are confirmed: Brown and Navy.

Here is the 2-in-1 set in Navy that you mentioned. It consists of a ribbed sleeveless top with a shoulder ribbon knot and mini logo embroidery layered over a long-sleeve top, and each piece can also be worn individually. For washing, hand washing in cold water or dry cleaning is recommended, and you should avoid machine dryers.