Get into the habit of typing ' more often at the very least. Try to type properly as often as you can (even here, it's*, galley*, no one cares if you make these mistakes outside of the game, but it will help you in your projects). If you turn it into a habit, you won't ever skip them even if you type fast. The mistakes do matter especially on the sexual parts or when you try to get people immersed. I guess you can also try to take typing exercises but you don't need to, I doubted them at first but they did work for me.
It's common for devs to make spelling mistakes though, even triple A games do it, and you made a few which is just as much as other devs, I think there has only been one game I played on itch.io without a single spelling mistake. Even if you try very hard, I'll probably tell you again about your spelling mistakes when I come back, I just hope you can at least fix them on the final release.