The usual name for lesbian manga is 'Yuri manga'. This term is widely used in the manga community to specifically categorize such content. There might be some regional variations or alternative names, but 'Yuri manga' is a common and recognized term.
Typically, these mangas focus on the emotional journey of the characters. They may depict the struggle to hide their relationship or deal with discrimination. Also, the art style can vary greatly, from realistic to more stylized.
I'd recommend 'My Lesbian Experience with Loneliness' by Kabi Nagata. It's a very personal and honest account of her life as a lesbian, dealing with mental health issues and self - discovery. As for gay - themed graphic novels, 'Watchmen' by Alan Moore has a gay character, Rorschach, whose backstory and relationships are explored in a complex way. It's not the main focus of the story but adds another layer of depth to the overall narrative.
Your local independent bookstore might be a great place to start. They often have a curated selection of diverse books, including those with gay and lesbian themes in the comics, graphic novels, and manga sections. Some well - known chains like Barnes & Noble also have a decent selection. You can also check online retailers such as Amazon, which has a wide range of titles available.