Do you need to have certain skills in order to play paintball?

Answer 1

There is no licence required to own/play paintball. You must be 10 to play, and 18 to buy almost anything related to paintball.
No, there is no permit or license required to purchase or operate a paintball marker. However you must be at least 18 to buy one.

Answer 2

For very low level tournament levels, all you need to do is sign up and show up.

Answer 3

No. You just need the equipment.