Hi,
first of all, for such work you should use better camera. Full-frame camera bodies because of price / performance ratio (a sweet spot is around 40 Mpix because of quality and time to process the data, higher megapixel count requires a shorter shutter speed (max 250/s) or tripod) or digital medium format camera bodies for best quality. Maybe more images also with detailed one.
Also, you can use High reconstruction.
But following all of these and then printing 3D model you can lose the details anyway.
These could be a good way top start with photogrammetry: Introduction to Photogrammetry | Course, Principles of Photogrammetry and Scanning | Learning path