This site is being deprecated.
Please see the official X‑Plane Support page for help.
There are plenty of YouTube videos on VATSIM. You may find the multipart video below useful for getting started. I’d also suggest that you first browse through the VATSIM.org website to understand if it is indeed the type of service/experience that you’re looking for. You did not find a price anywhere because it is free.
VATSIM is live person ATC. Communication is via either typing or two-way voice. IMO, it comes pretty close to real world ATC, in terms of procedure, situation and phraseology. Thus, if one does not have previous ATC interaction IRL, it could be a bit daunting at first.
This site is no longer being actively maintained.