I'm worried from the first week. Should I continue?

Hello. I'm feeling quite troubled since the first week. I just started teaching in the Gangnam area for the first time, and it seems like the school has been dishonest about various things. Originally, I was supposed to receive training for 4-5 hours a day before the semester started, but now I'm working full hours. It seems like people are uncomfortable every time I don't know where things are. Also, I've heard that there are negative comments about me from those around me. I'm 22 years old, and most of my colleagues are older and have more experience. It's still awkward, but the kids like me. And I don't know what level of classes I'll be in charge of once the semester starts, and since it's summer camp season, I can't really prepare for the classes properly. I've been told that I might teach Korean and English later, but that was a sudden announcement for me. I have a Korean language certification, but translating is not easy, and sometimes I struggle to understand the words the kids use. It's really frustrating to start without preparation. I'm not sure if it's right to continue in this situation. I usually don't give up easily on new things, but considering my mental health, I'm worried. I'm tired every day, and I'm already afraid of the next day. Since I'm still in the beginning stages, should I wait a bit longer? I need your opinions.