How to make an N64 model?

If you want to be authentic, then you should use Nendo. Then you will understand the limitations they had to deal with back then.

If you can not find a licence for Nendo, there is an application called Wings 3D that is a carbon copy of Nendo.

Some other interesting trivia:
Reality Co-Processor @ 62.5 MHz
640 × 480
16.8 million color palette
4:3 aspect ratio.