Thrifting as a transgender man?

Hi all! I’m (19) a transgender man and have been searching for clothing that’s more fitting for me in terms of concealing my curves (or what little curves I have, lol) while not swallowing me whole. I find that thrifting can be difficult sometimes, as my local thrift stores typically don’t have men’s size smalls (is this a common problem in other areas)? It’s especially difficult given my style (Pinterest examples attached). Do I just resign myself to shop in the women’s section for more gender-neutral options? This definitely is not my top choice, but I’m starting to run out of options, especially as summer approaches and I’ve pretty much outgrown most of my shorts. Any advice welcome!