The Azteca jacket is a jacket / sweater is made with the mosaic crochet technique on the main part, where you have to make double crochet and single crochet depending on the chart. You don’t need an advanced crochet level. Then you will make edges around the main part and add the sleeves.
This jacket have 3 different parts. The rectangle made with the mosaic crochet technique following the chart, with the armholes. The edges (double border around the corners). And the sleeves.

You can find the free video tutorial of this jacket here https://lanasyovillos.com/en/clothes/azteca-jacket/