You were very resourceful at such a young age to sell greeting cards. Just so you are content in what you are doing now is all that counts.
I was very happy in all of my many jobs... some spanned many years. I am retired now and working on making my wife my pretty little Mrs. as happy as I can in her retirement years. My job now has been focused on making her life secure and financially stable to go on without me should something ever happen to me. I think I have about got all corners covered... including how to go online and pay bills and manage our banking and to know all the ins & outs. Most everything I have set up to pay automatically. Most everything is on auto pilot. We can now travel the country and go camping without a care... all is set and takes care of itself. This is how to retire. aaahhhh!