Like this. Or my box demonstration. You're still not getting the part about having the phone directly above the coin.
Probably be even better if you don't have the label and the coin in the same shot. The camera is trying to focus on the letters of the label.
You need to be directly over the corn, not on an angle. Look where the camera lens is on your cell phone that’s the part that needs to be directly over the coin. Study the phone with one hand and take the picture with the other. For the blurriness I see it’s because you’re on an angle and you’re still too close. Try making it higher and you’re still not cropping the picture. You can only make the coin larger by cropping the picture and getting rid of all that black background.
I have to try on my kitchen table where I can take a photo directly over it. When I do it on my computer the details are gone. I cropped the image and it looks bigger.
Why are you taking the picture on an angle? Also, I put a white piece of paper behind it - so you set your phone on something solid - a stack of books or a can or whatever, directly placed above the coin, as Kentucky sketched above - and Lord M pictures it too, and then you just snap the photo with the phone solidly in place on the support directly above the coin, with some lights on around you. You'll get it, just keep working with it. Also it apparently helps if the coin is slightly elevated - like with a bottle cap if possible - it helps the camera focus on the details of the coin rather than the surface it's on.
That’s much better. It should look bigger. We can now see the details better. We know what the size of the coin is so size really doesn’t matter. Now just get directly over top of the coin so it’s not on an angle. It will be clearer and sharper in your image. When you do you’ll see the difference.