For a new or entry level gun owner, I'd join the NRA, www.nra.org
I'd also see these popular sources; www.gunvideo.com www.paladin-press.com www.policehq.com www.deltaforce.com
Some of the top US pistol instructors for armed professionals & private citizens include Clint Smith, Massad Ayoob; www.Massadayoobgroup.com
, Duane Dieter, Jeff Gonzales, Larry Vickers(a former Spec Ops/US Army trooper), Chuck McCann. "Chuck Taylor" is a well known gun writer & instructor but I take issue with a few of his remarks/lessons. Taylor wrote for years that the 1911a1 .45acp with the standard factory 230gr FMJ was "best" for armed carry-defense.
The NRA offers many good classes & training sources.
For details about gun laws & travel see; www.gunlawguide.com