Usually, the EK flights arrive at the E07-E09 gates. That time of the afternoon can be fairly busy at immigration.
For the A380, the jet bridges usually get attached to the lower deck first but you have to go up an escalator to get to the arrivals level.
Immigration is well signposted (follow the crowds anyways). You will hopefully be off fairly quickly so hopefully not too much of a queue. The desks are well signposted for Foreigners and Immigration officers in general fairly efficient so shouldn't be too long. Once you come through the immigration desk head straight on to an escalator that will take you down to the transit train (no other way of getting to baggage reclaim). The transit trains are fairly regular but my advice is, get to the first carriage (furthest from the escalator).
Once you arrive at the at the main terminal building, the corridor will take you in to baggage reclaim. There are screens at the entrance to the hall which will tell you what belt to get your baggage from. Once you've collected your baggage then head through customs which is near the middle of the baggage hall. Unfortunately, the past few times I arrived, Customs were x-raying all arriving passengers so can be a bit of a bottleneck.
Getting into the city can be a bit of an ache. The taxi rank is below ground level and can be reached by elevator. You may be approached by hawkers once you come out of arrivals asking if you want a taxi. My advice is to avoid them at all costs. If you are going to take a taxi then make sure you go to the official taxi rank. They are all metered and a trip into the city should be no more than RMB100. Unfortunately, it can be extremely busy and waits for taxis can be in excess of 30-40 minutes if not more. Language can be a bit of a barrier too so if you have a smartphone, download an app called Beijing Taxi. When you type in your destination, it will show you a taxi card in Chinese which you can show to the driver, otherwise try and have the address of your accommodation before arrival in Chinese.
The other her way to get to the city is the Airport Express. Depending on where you're staying is dependent on whether this route will be useful. Can't remember the costs but my personal feeling is that it's not much of an express as it goes back on itself when departing terminal 3 to go to terminals 1 & 2 which takes up the majority of the journey before heading into the city. If you are going into central Beijing, you would then have to get a taxi to your accommodation.
Other tips include installing a VPN on any PEDs (smartphone, tablets, laptops) before you go. There are a few sites that the Great Firewall of China blocks (even FT at times). Be prepared for smog. I was led to believe that the government are trying very hard to improve air quality, but random checking on my AQI app still shows the pollution levels as high at times and it can be quite unpleasant.
It it is an interesting city and practically all street signs are in English as well as Chinese so that shouldn't cause any problems when walking about. Sometimes the city can feel a bit 'sterile' and closes down about 10pm (apart from bar areas in Sanlitun).
You're only there for a short period of time so enjoy and if I can help you with anything else don't hesitate to ask. I'll try my best
S