Soon to be college grad with a B.A. in psych. Looking into Master's in IO

I'm at a pretty confused point in my life. I have no idea what I want to do as my career! I really am late in the game for applying to grad school because i'm in the process of trying to figure out what to get my master's degree in.

I love psych. I thought I was interested in social work but I realized that I just don't think i'm cut out for it (way too emotional). Also, I heard the money isn't really that good in social work, even with a MSW.

So, i've been searching into IO. It looks very interesting; however I would love to learn some more about it from people who are actually in this field.

Would anyone be so kind to tell me why they decided to go into IO? What does their job entail? What kind of skills do you need? What is the most interesting part of their job?

Also, anything about the master's program for IO would be helpful! I'm basically still clueless about this profession.

Lastly, I would like to get an internship this summer; do i search for HR internships? I don't really understand the difference between HR and IO? I think the only way to know if i'm interested into getting a degree in IO is through an internship.