Do I need to know how to draw?

Absolutely not. This is simple and allows you to let go of your expectations and schedule and gives you permission to just create.

What is an 'experienced' Tangler?

An experienced Tangler has attended a Zentangle class or done their own study on this technique. There is a process and basic patterns that are beneficial to learn first. You most likely have some art books and pens, pencils that you would like to use. This saves some money on supplies.