work related

so I am 18 years old I just started my first job working in a kitchen I've always wanted to work in the kitchen but now that I have worked in the kitchen and serve food there is a feeling inside of me and it's telling me that I don't want to serve food and to be honest I don't really like my job that much I've only been working there for 2 days and already when I started my job I had back problems but the bad problem started for started working but it's making it even harder for me to work and I don't know what to do