The link above takes you to the USA Pickleball Player Skill Ratings rubric that provides specific skills needed to achieve each level of player rating. One can see the definitions for each rating and download a skills sheet to self rate and allow yourself to be rated by other players.
Players are able to add their self-rating on their PickleballTournaments.com profile. Initially your rating is labelled as an "S" rating. Once you play in an official tournament, your rating will be updated to an "T" rating. USA Pickleball strongly encourages members to seek self-ratings guidance from experienced USA Pickleball tournament-rated players, USA Pickleball tournament directors and USA Pickleball ambassadors. (Our Medina Ambassador is Carol Erickson) [Ref: www.USAPA.org]