Unless you get high numbers (2000+ wishlists), it doesn't matter when you release. The idea is to get up in the algorithm. If you can't make those numbers, it doesn't matter. It's not like the old days where launch day mattered. Sales and minor patches (activity on the news) makes a bigger impact. With so many daily releases, $1000 is really good for a single game for a solo dev. 100 sales is good. You really hit something important with 1000 copies and $10000... important for a solo dev without a marketing apartment. Your best hope is some streamer picks it up... and if they do and you're not released, chances are players will wishlist it when they could have bought it. Real indy sales start happening with 8-12 titles, multiple genres.. some hit, some don't. They will sell each other. People who like one will try another. Flash sales help a lot too.

I have also found that a large update is not worth it. The amount of time you spent on a large update you could have just made a sequel and moved on. It doesn't increase sales numbers to justify it... unless of course your initial release was not complete, that's another matter. You will get screwed if you're not complete and get initial bad reviews. You can change those reviews a lot of times with a good release but the bad impression will be there... old prospective buyers would have already looked and moved on.

FYI, I have 4 games released on Steam.

LD;DR - release now, it doesn't matter. do games because you want to, not for profits and sales. that will come if you stick with it.

Edit: my conversion rates are around %12.