It's not necessary to play through those three introductory scenarios in order to play PFS; since all characters start out at 1st level in PFS, you will be able to join in any of the Tier 1-2 (1st to 2nd level) scenarios offered- in the case of this coming February 4th, any of the Shades of Ice ones would be suitable for you.
In order to get started in PFS, you may want to check out the link below:http://paizo.com/pathfinderSociety
A guide to playing PFS can be found as a free download at the following link:http://paizo.com/pathfinderSociety/scen ... 48btpy84k4
In case you wish to use pregen characters, they can be found at this link:http://paizo.com/pathfinderSociety/preg ... Characters
Since you've mentioned playing through the Beginner's Box, the following link will take you to a downloadable pdf that shows how to bring your Beginner's Box up to PFS standards:http://paizo.com/products/btpy8qev
There'll be an upcoming Gameday Meetup for February 4th that you can sign up for, and there's expected to be PFS scenarios available for all timeslots at the meetup. You can find out more info at:http://www.meetup.com/pasadena-dnd/mess ... d/19257342
If you have any further questions, please feel free to message me.