Nice coin.
Good choice of background.
Your lighting is good. Just needs be be adjusted slightly.
Notice how the bottom of your images gets a bit dark.
And the focus on the obverse is a bit off.
The reverse focus look good.
For a first iteration, well done!
You'll find like I did that it will take a LOT of experimentation to get it just right.
And then you'll go to you next coin and have to tweak the settings a bit. Or the lighting.
ABSOLUTELY IMPORTANT: Keep accurate records of the camera settings and lighting. You don't want to have to "re-invent the wheel" for each imaging session.
You'll find raw coins will be the easiest to image.
The only significant changes will be when you change metals, so you'll need three somewhat different settings (copper, silver, gold.)
Slabs will present more difficult problems.
- Focus on the coin, not the slab.
- Reflections.
But the one that is driving me crazy is proof coins.
They are REALLY tough to image.
Mostly you have to play with the lighting.
Keep at it.
Looks like you are off to a good start.
And convince your brother that you should have the camera when he's not using it