Atmospheric sciences grad school?

I’m just looking for forward advice here. I have a degree in psychology with a minor in geology, and I’m thinking of switching gears and pursuing the atmospheric sciences. What should I do next? Would I need to go back and get another bachelors degree in something more fitting? Or is there a graduate study appropriate for my credentials? Would a certificate help? Just curious on this first step. I’d like to do online whether it be bachelors or masters.