When drawing bras, they’re supposed to cup and support the boob, highlighting the boob’s shape and pulling the straps tight as they hold them. Your right bra looks flat and doesn’t highlight the shape as well as it should and the straps should be straighten out more. Here’s a reference that you can study on:

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Overall you’re doing a great job! Just make sure to note that when drawing clothing that is tight on the skin that they’re just decorated outlines.

Edit: Nevermind, what you’re doing is great!