I turned 19 yesterday, and have had my PPL(H) since January. Though I'm not working yet, I have not found that being unusually young has caused any problems. Other pilots don't seem to worry about my age when flying with me. I think you would most likely encounter friendly surprise from people who were told your age.
I personally look at youth as an advantage - potentially, a young pilot has a much longer career to look forward to then a pilot who has chosen flying as a second career.