The Wellesley Recreation Department has five public courts available for use by individuals who would like to play pickleball. There's a free annual membership available to residents for daytime play. $75 per year to reserve courts after 4pm. link
First, get a Wellesley pickleball membership (see above) in order to get no cost court time. Create an account here
Using this site, you will be able to create and join play sessions with other players in your area. Link