Novice model, can I spray it directly if I buy one? What else do you need? What are air pumps and gas tanks? Can you introduce it?

For spraying, you need an air pump (providing a certain air pressure for spraying), an air storage tank (storing a certain volume of air source, which is conducive to the stability of the pressure of the sprayed gas) and a pen (a tool for spraying) to play spraying.

Directly on the industrial air pump, if the technology is good, you can make a turtle pump for entertainment.