Mighty Morphin Power Rangers Legacy Power Coin Help

So I want to create my own Power Coins for a Legacy Power Morpher but I have no clue how to go about doing so, My Hope is to 3D print custom Power Coins for my own use when I eventually make my Master Morpher, I already know the basic measurements of them, the biggest problem I’m going to have is how to make the ridges on the edge of the coin as well as how deep to make both the front and back inset, here’s what I have so far, if anyone has any advice feel free to share