I booked the tickets online via their official website, I’ll leave you the link here. I suggest booking a few days in advance, and if you can avoid the weekends since it will be crowded. I went during the week around 3pm and it was still somewhat crowded.
The exhibition is on Pier 36, and it consists of a 40 minute video and audio show covering some of Van Gogh’s work and paintings, including the world famous “The Starry Night”, “Almond Blossoms”, “Irises”, “Bedroom in Arles” and more.