haha, I know that feel XD. Futa will generally let you see most of the content. But some scenes default to cock if you have one (due to coding reasons,) and there's also some flat chest stuff too.
Find the succubus tower, and you'll be able to adjust your genitalia at the body workshop there any time!
Futa is typically cock on a woman's body, balls optional
Routes are never impossible or time-limited, but certain content you can only go through once, so make sure to keep some backup saves! You can also do a NG+ from the sanctum and start the story over from the beginning!