An amateur creates lousy artwork and quits. A professional creates lousy artwork and keeps working. To produce great art is to re-create pretty good art. Don't be in such a rush that you give up great work because works that is OK is in front of you. Keep playing until you find the greatness.
To create anything great, whether artwork, woodwork, athletic achievement, children’s education, or scientific experimentation, you much first do and then have the humility to expect it to go wrong and adjust and make it better and better.
Never give up and never let a bad day, month, or year stop you from pushing forward. The amateur fades, the professional finishes.