If you do not reserve your ticket there is a second line for those who do not have them. There you will have to wait until the entrance is sedated. It depends on how busy they are, you can wait a long time.
The entrance is not paid, it is free but you have to book the ticket in advance, it is quite crowded ... You can reserve the ticket on the museum's website 🙂
Thanks! Your answer is awaiting moderation.