Tickets are purchased at the entrance of the park? Is the entrance easy? Or to buy a ticket you have to make a long line?

I recommend you to avoid lining up, buying tickets online.

I bought at the door yesterday February 23, 2020 and there was nobody queuing. I arrived at 9 in the morning with everyone and everyone entered directly. All empty windows

You can buy it at the entrance of the park, but it is much easier to buy it online, you save the rows and you arrive with the tickets.

Generally there are not so many people depending on the time of the year is very well organized everything

You can buy in the park, usually at this time there is not so much agglomeration.