Responses
I stumbled across this yesterday. It might be what you're looking for:
https://www.mangago.zone/read-manga/if_youre_gonna_dress_up_do_it_like_this/
Been searching for sooo long, thank you so much, that is it!
There's this manga of a guy learning how to style himself with the help of his sister. Each chapter is him learning how to style a new piece of clothing