Practices Are first and third Monday, open to public. Matches are generally 4th Saturday of the month, except feb, nov, dec. we love new shooters! Just let one of the guys running practice know you are new to action shooting. You can also go to the Mertowest tactical website.
The Harvard USPSA gang also has open to public practices on Wednesdays, not sure of the time or how often, check the club calendar.
USPSA practices are Wed evenings from 5-7 or so. We also love new shooters, so if you want to try the game that doesn't require a fishing vest just come on by! (I kid, I kid)