The Wicked

I went to the cinema to see "Wicked" a few days ago.

I arrived there earlier.before the film

I needehad to wait for opening time.

I was moved by the film.

Especially, the two actress playing were overwhelming.

I went to the cinema to see "Wicked" a few days ago.

I arrived there earliery.

'I arrived there earlier' is the wrong tense in this case.

I needed to wait for opening timeuntil it opened.

'I had to wait for it to open' would also work.

I bought a popcorn before starting the film started.

Popcorn is an uncountable noun. You could count every piece of popcorn, but as there are so many, we say it's a collective substance. You could say 'a bag of popcorn', as a bag is countable.

'starting the film' suggests that you are in control of when the film starts. If you watched it at home and got popcorn before pressing play, 'before starting the film' would make sense.

I moved by the filmThe film moved me.

Especially, the two actress playing's performance were overwhelming.