We have international flight from Delhi to los angeles.

We arrive at Beijing at 11:30 am and our flight leaving Beijing is at 9:00 pm.
we want to see Tian'anmen square and forbidden city. we can take air port express train as it saves time.

what are the steps- we have store our luggage we are two people and two bags and two carry ons. please guide us for the steps once we arrive.

collecting luggage, storage of luggage and how much currency exchange and where we can get exchange, purchase tickets for train to tinnamen square
and finally do we have enough time to visit.
kindly reply with procedure steps
thank you in advance for your cooperation