Still good in 2019?

Hi! I’ve been looking for a second game to play (coming from FGO), and Girls Frontline caught my eye. I’ve heard that it has a good story, and it’s one of the more F2P-friendly gacha games out there.
I wanna know how good is GF now at 2019, and if there are any tips or guides I could read before I start?

Much thanks!