Unsure about graduate job opportunity

I recently graduated from university and have received a graduate job opportunity.

I’m not sure what to do! I currently work full time at a job that is unrelated to what I studied. I absolutely love my current job- it pays well, my colleagues are wonderful and I genuinely enjoy going to work each day.

I don’t feel like I am ready to leave my current job yet. But I also feel somewhat guilty because I am not utilising my degree/ beginning my career.

Has anyone ever been in this situation?