notes:

• i highly recommend using dynasty reader for series that have not been serialized outside of japan yet! they also have a huge collection of yuri doujinshi, very good resource!
• all series will have a link to their anilist page.

my absolute favourites:

• bloom into you — it's just chef's kiss, perfect series.
• my lesbian experience with loneliness — nagata kabi is one of my favourite authors, and this memoir manga was her breakout hit, all about her sexuality and mental health.
• my solo exchange diary — the sequel to my lesbian experience with loneliness, and honestly even better than the original.
• i'll become a gal whose kind to otaku! — romance is not a focus, but this is a super silly series about a former social outcast who dedicates herself to becoming a gyaru in high school.

other great recommendations:

• i'm in love with the villainess — technically i read the light novels, but still an absolutely amazing yuri series about a woman who is reincarnated as the protagonist of her favourite dating sim, and becomes determined to make the game's villainess fall in love with her.
• the guy she was interested in wasn't a guy at all — green yuri! genuinely features one of the coolest love interests to ever be in any yuri series, mitsuki koga the woman that you are...
• girls x vampire — a really annoying vampire girl turns her classmates into her kin, only to find out that creating kin is against the law, and now she has to avoid the vampire hunter that is set on gathering evidence against her.
• bloom into you: regarding saeki sayaka — spinoff light novels of bloom into you following one of the major side characters!
• shoujo manga protagonist x rival — a shy high school girl realizes that her crush's female best friend is sabotaging her chances of getting closer to him, but it turns out that her sabotage comes from having a crush on the main character as opposed to her friend.