This show has provided me a similar experience and Marvelous Miss Maisel. Both were genres and subject matter I had little interest in, but after watching a few episodes the writing and acting were so good I got hooked. There really is nothing about this premise that appeals to me but it just pulled me in and the two leads are really great.
Hannah Einbinder has really accomplished something remarkable in my opinion. I think I had initially made an assumption that her character would be cringeworthy but she has such a well developed three dimensional character I've really enjoyed her. She's awkward, yet somehow gorgeous, smart and confident yet vulnerable and flawed, precocious yet humble. By the end of this current season, I find myself so invested in her.
The supporting cast is also growing on me but especially Kayla who I adored right away and it's really satisfying allowing her to evolve and not feel compelled to keep her as the cartoonish persona she had early on. I get the biggest kick out of her and the actress is such a force of nature. I smile every time she comes on screen.
As for Jean Smart. I just believe her. I believe this person exists and that they behave the way she does. She's evolving too but without losing the core of her persona in an unrealistic way.