First, peel, wash and dry or directly dry.
If there are no conditions, then create your own conditions.
Then put the processed raw beans into the baking oven. If the conditions are limited, you can try frying in an oven or pot. The coffee brewed in this way is uneven inside and outside, which requires good heat control ability during baking.
Grinding roasted coffee beans.
Extract with the corresponding vessel (extraction = "boiling")
Coffee machine, hand washer, pressure pot, siphon pot, mocha pot, etc.
If there is no special equipment, just cook it! Cook and filter.