A professional symphony orchestra must graduate from the Conservatory of Music majoring in violin before it can enter. Even if you get the tenth grade at the age of 25, it doesn't meet its requirements. It requires not only violin majors, but also ensemble, music theory, sight-reading, etc., and must undergo professional training.
Saying that you can work hard can only be an encouragement, although I also hope that your dream will come true.
But some universities have amateur orchestras, and cities also have amateur orchestras. As long as you know the violin, you can take part in the competition.