PornBox.com

I'm new here. Is it important to have experience to start DAP porn movies? I'm Chiara I would be interested.

If you think you can handle it try to contact a adult model talent agency. Two that work closely with studios on LP are:

http://www.thewhitemodels.com/01/model_wanted
https://unitedmodeling.cz/registerc.php

If you contact them they can help answer any questions you may have about the work.

But are there 18/19 models or are all from 20 up?

There are some. Gabriella here for example started out at 18 and there are others to.
https://www.legalporno.com/model/3418/gabriella

I whish you good luck.