I worked at a nursing home when I was a teenager and I have to admit, at that age (15,16) ALOT of things scared me....I had no idea of what to expect and no personal experience with elderly people in need of help. I was also very very shy and that doesn't meld well with some older people who have lived full lives and are very confident...
I completely encourage you to volunteer at a nursing home though. You will learn SO much.
Being an RN is a fantastic job, high-paying and you can take it with you wherever you go....If you like the business end, become a head nurse or an administrator. My aunt does this now and makes big bucks and still has the rewards of the patient care.
You are obviously a big-hearted, loving person and I don't think you would be happy in a "business" field. Go where you can use your heart AND your brain!!