The EXIF is all in the file, just need to look for it. You can see it in the file properties (right click the file, select properties) or you can grab a browser add on to view it on the website. I use "Exif Viewer" for firefox.
So, the OP is using a D3100 with 18-55 lens, at 55mm for all of these shots.
As far as I can tell, he's on auto (Exposure Mode = auto exposure (0)).
I don't know if I'd call these macro, more closeups.. but that doesn't really matter. You asked about composition and I think that's a good thing to be working on. All of these are from a top-down angle and they don't show anything in the scene other than the coffee and a few bubbles. If you intention is to make the drink look good, you should pull back a bit. Maybe either show the whole cup in the center, perfectly top down and the handle sticking off to one side, maybe diagonally... or shoot from a low angle. The flash fired on the last 2, and the hard light didn't really do much to make the drink look appealing. Also, if you're really serious you'll want to wipe down the edges of the cup so it's perfectly clean and not stained with coffee.
If you need some ideas, try a flickr search for whatever it is you're shooting.. odds are it's been done before. Here's a search for 'coffee'
coffee - Flickr: Search
Hope that helps! Don't be afraid to take that sweet camera out of auto mode either, "A" or aperture priority will let you choose the aperture and ISO and will decide the right shutter speed for you, so it's pretty easy and it'll help with learning about exposure.