I want to make my own billboard and draw it with AI. How to set the size and proportion of fonts and shapes? What is the following process? What equipment do you need?

Generally, PS software is used to design billboard images. First, enter the "new" size yourself, and the resolution is between 72 and 180. If the resolution is too high, the painting effect will not be achieved. For photos, the resolution is between 200 and 300. After the design is completed, save the jpg file and send it to the inkjet printing company for production. If you want to do it yourself, you need an inkjet printer or a photo machine.

AI is generally used for typesetting newspapers and magazines, but rarely used for advertising design.