Holding your camera still over a tiny negative is near impossible so you will need some kind of holding device. There are essentially two options - a tripod or a copystand. This section will briefly mention tripods and you can feel free to read about them here but to get the most consistent, frustration-free results you want a copystand. The rest of this section will therefore focus on the various different options out there.
The most important task of this holding device is to hold the camera in a fixed position, parallel to the negative, while being sturdy and provide adequate adjustment to make them parallel. Different price ranges will give you different levels of sturdy build, different materials and more or less adjustment.
Hold the camera rigid and parallel
Have adjustments to achieve perfectly parallel alignment
Be as affordable as possible
It is possible to use a tripod but a copystand is much preferred