I released Ch. 1 of my game back in March at about 11,000 words, ~360 renders, plus a few animations. The reception of the game has been mostly positive so I think the size was ok but there are two things I would've done differently that may have helped the release.
1. Had a marketing/social media strategy.
I focused all my energy on trying to make a good product but had no plan other than to release it on here. Having a social media presence and some promotion of the game established prior to release I think would've been the smarter way to go. Even now, I'm still really lost on this aspect of development so definitely look to wiser individuals for clearer advice on this.
2. Had Ch. 2 ready to go.
Quality development takes a lot of time, and you will continue to find new ways to make it take longer. I'm still constantly needing to learn new things in Daz and Renpy to achieve my goals. As others have said, with the first release there isn't much pressure on time. The moment you start getting support though, you'll feel the clock. Having your next update already finished gives you the luxury of not worrying about that next deadline. It will help you keep pace while maintaining quality.
Anyway, hope this helps and good luck.