39 years old, almost 40! MOREOVER, I HATE THAT DAY THAT COMES TOWARDS ME!
Only thing I can add to this topic is: Do not stop making music. Try to compose/arrange every day and keep pushing out products. Do not hesitate to upload your songs/mixes here in the PLAP community, even if they are not completely finished. From the moment you have doubts, ask a second opinion here and you will be fine!