Many look for the camera to take the shot and correct the lighting. You've found out that you need a light box but only need to watch more youtubes about that.
You can make your own and what camera do you have now? Tripod is nice but I've used homemade devices too. https://screen.yahoo.com/pogues-basics-instant-tripod-lamp-153246819.html is a tech tip I've used with great results.
I have beautiful silver jewelry that I make and want to sell online. I want to know what I need to look for when buying a camera, with minimum amount of investment. So far my attempts to create light correctly have led me to understand that I need a photo box so I can diffuse the light and a tripod to hold the camera. I have read about (still confused about) macro photography. I am limited to about $200 for my initial investment.