It's a great game, and there is a lot of content already. I would jump in.
I wouldn't obsess over chasing "official release" on indie VNs like this (and most of the games on this site fall into that category.) They just keep adding content indefinitely, they aren't like early access products building towards "completion" per se, they go on until interest wanes or the story runs out of legroom or the dev just burns out lol.