Personally, I believe in telling folks that are just starting out with armor to "Crawl-walk-run" when they first "approach the bench"...
For beginners, or those just getting into the genre of modeling military vehicles, you really can't go wrong with Tamiya kits... They aren't as "accurate" as say, the latest Dragon releases, but when you add in the fact that you probably don't want to drop 80 bucks on a kit that you're afraid of screwin' up, Tamiya makes the best mix of detailed vehicles coupled with a lower price-tag than Dragon, Trumpeter, AFV Club, or Italeri...
The newer kit releases will hit you right out of the box with the sheer number of parts (some have aroung 400) to contend with (about half of which are individual track links). Once you've gotten 6 or 8 Tamiya kits under your belt, you'll probably then wanna "move up" into the expensive kits...
Early Tamiya kits, like the M41 Walker Bulldog, T-62A, T-34/76, Panther A, Sdkfz 251/1, Willys Jeep, Bren Gun Carrier, and some others from the 80s/90s that are in the 25.00 to 35.00 price-range will go a long way in giving you fairly easy builds with a fair amount of detail and a lot of room to improve your detail-painting/weathering skills on before you jump into 50.00-80.00 kits, when the armor/tactical vehicle bug bites you fully...
As for accuracy, there are some of those kits that aren't exactly what they could have been, but unless you have a bunch of research material available, you won't notice much of the inaccuracies... Like the Tamiya T-72As shallow turret... Never noticed it all until I was used a real T-62A for reference...