First of all, CONGRATULATIONS on becoming an LPN at 19! That is a HUGE accomplishment, and you should be very proud of yourself!!!
As far as explaining to others, I agree with the other posters. Saying, I am an LPN, and studying to become an RN should be sufficient. I have found for myself as I have been embarking on my own journey (transitioning from a totally different career field to nursing) that more and more people are hip to the differences between CNA, LPN, RN, ARNP, etc.
More than anything, make sure that you don't feel bad about yourself, who cares if people think you are less of a nurse and that you aren't licensed, cannot give injections, etc. They are probably just jealous of your success!
The bottom line is as an LPN you play a critical role in the care of your patients, and the RNs you work with wouldn't be able to manage their case load w/o your help. To boot, you are in the process of going back to school to further advance your career. All at the tender age of 19.
So, don't let any dummies who aren't familiar with nursing jargon make you feel inferior
The following member says Thank You: