Should I work as a greeter at Walmart?

In about 6 months, I will be re- entering the working world and coming out of retirement. I am 71 years old, will be 72 when I go back to work. I want a simple no brains kind of job. I need to work in the private sector for about 2 years. I don't get bored easily and can deal with stress. I have multiple college degrees but do not want to use them particularly. I am a retired teacher, but I need a job in the private sector. Night shifts or very early morning is OK. Health improving but has been shaky, stamina limited bit will be looking for full time work. Look good for my age.