If your art refers to another artist's work, they may say it is too obscure. At the same time you will hear critics state that what they would really like to see is an innovative art that understands the tradition of art, that is accessible to all viewers but is not afraid to have a deeper layer of meaning. Always remember that the art you are creating is for you and you alone. The more you do it the better you will get. Ignore people who want you to do it perfectly.
Art is never perfect and new art is a groping process.
You will be your own harshest critic. You will know when you have created a really good work and when you have created something ordinary. Look at the work of others in your art form and other art forms as well. Look at their techniques, absorb the feeling of a piece. Look at work from artists of the past.