I think we may have met in passing at Palomar on a launch maintenance day. Welcome!
The usual plan for most is to show up at AJX early afternoon (unless you’re trying to get a morning flight in). The “Sandy Van” runs almost every flyable day, and the page to sign up for that is here. There are a few other ride options (others that offer rides on most of the flyable days) here. If you don’t find anything on either of those the day before you want to fly, it’s usually very easy to find a ride just by showing up at AJX and asking around. All else fails, you can drive up and hopefully top-land, or Uber up to the turnout for Marshall and hike (it’s an easy 30 minute walk from the road up to launch).
I see you already squared away your club membership – thanks for the support! For a site intro, I’d recommend starting at AJX and ask any local for a briefing on the LZ, and then another when you get up to launch. Of course, make sure to read the site guidelines and briefings on this site too before you come out – those should help a bit with details on the approach patterns into AJX, information on the launches, hazards to avoid, etc.
Feel free to post any more questions you have here, or you can email firstname.lastname@example.org (that gets checked often).