Moving to Milan this evening - Few questions

Hello everyone!

On a very short notice it was decided yesterday that I am moving to Milan tonight. I will fly arrive at Milan Malpensa at 8pm and my flat will be just outside Moscava. What's the best way to get to Moscova from Malpensa? I was thinking of taking the Malpensa Express until Milano Cadorna and then taking the 2 until Moscova? Is that the best way without taking a taxi? I will only have one suitcase with me until all my things are getting shipped over once my probation period is over.

I will need a SIM card, again, until my probation period is over I only want to have a pay as you go card. I have an iPhone 5S, I can use all networks on it. What's the best provider and how much does it cost? Can I get it somewhere at the airport upon my arrival tonight? I will mainly need data, I use lots and lots of social networking for work so the best thing would be an unlimited data option. Text messages aren't important as I use mainly whatsapp and messages.

Thanks,

Nadine