My Dragon Era Seems a Little Off

(Male protagonist; he won’t be female throughout. Being a woman is only a temporary phase, and he’ll mostly be male.) I transmigrated. I ended up in the Dragon Era world and became the younger brother of the wife of Shanshui City’s lord... Not bad... My brother-in-law is the city lord, so I probably won’t have it too rough, right? But something seems off about my life in the Dragon Era! First, when I turned eight and summoned a dragon, I turned into a girl, but then I couldn’t even summon a dragon. What’s that supposed to mean? Is this right? I’m a guy, aren’t I?! What do you mean there’s another soul inside me? I summoned a dragon onto the other soul?! What do you mean I’m going to school, and my brother-in-law’s enemy pretended to be a teacher, said he’d take me on a training trip, and then sold me to the Demon Dragon clan? And what’s with all this training and getting sold off? I said I’m a guy, do you believe me? Why do other protagonists start out as overpowered gods, while I have to get gender-swapped from the start? Is this right? The Dragon Era is supposed to be a cheerful cultivation world, right? So why is my life nothing but hardship and traps?