Honestly, my job is so simple I could have done it in high school.
Is your job really so easy that you could have just not gone to school for it?
I really feel like it, it just feels way too easy.
I get that your job feels super easy but did you consider it's because you went to school that it feels that way? Either way, you may want to look for a new job or get promoted and your education will help you achieve that.
No way! I'm fine right here. I will get stressed if I start to advance.
Human beings advance as they move along in life and to stay in an easier job just because you are afraid is not correct. Trust and have faith in yourself and your innate abilities to reach new heights in your life.