>>67402219I would say it depends on what the anon wants to improve on. A few go-tos on the top of my head when it comes to dialogue are Our Cures, and Cover High. Fujo Fantasies does a good job translating quirks into speech.
For scene tones, I think First Summer Memories paints great scenes with its subject matters. Aunties Little Secret also does amazingly in this department, and how its splashes of color from go from bright sunshine to the bleak despair of night is spine chilling.
For rough and tough action, Heartbreak Tokyo will give someone a good idea for how that reads for sure.
Worldbuilding I'd recommend Holoslavia and Holofantasy, Cover High also accomplishes it's own world building with the amount it needs.
A lot of authors here put a lot of great out there for people to read, people just gotta buckle down and do it when it strikes them. It's easy to practice the mechanics of writing by just making some scenes, but reading and really absorbing how it's done by others is practice too.