So far you have some tanks coming...
Do you want to stick with tanks-only for a while, and expand your collecting of heavy metal? Or do you want to start working your way into combined-arms actions right away?
Tanks are often the most fun or favored part of micro-
armor wargaming. Many gamers come to view artillery and infantry as "drudgery" versus the armor-on-armor action.
If you stick with tanks for a while, I would recommend one pack of Tiger 1s to give you a feel for the German "cats". Stay off of the Panthers until you move past Kursk into late-war. Stay off of the Elephants until you have 50 or 60other German tanks at least (they were exceedingly rare). Then add more mediums, IIIs of various marks, and IVs (both earlier and later than the F2s). Also consider some recon vehicles, maybe some Armored Cars or Pz IIs.
For the Russians, more T-34s, some KV-1s, and some light tanks, perhaps a mix of T-60s and T-70s. During the early/mid phases of the Eastern Front (from winter of 41 through Kursk), light tanks formed 30% or more of the Soviet tank force.
But ... those of us who are more historically-inclined see the infantry and artillery as critical components of the gaming experience, and work hard to ensure they are a part, often a big part, of any action.
If you are interested in exploring the combined-arms side of wargaming early on, I might suggest you try the GHQ sample packs for WW2 Russians and Germans. You never know exactly what you'll get in a sample pack, but you can bet it will have a tank, another vehicle or two (maybe truck, maybe halftrack, maybe recon vehicle), a gun or two (maybe artillery, maybe anti-tank), and some infantry.
If you are gaming at 1-to-5 unit scale (as per the GHQ Micro-Armor, The Game rules) this will give you enough material to get some combined arms action going.
And they are a pretty good deal.
Oh, and order soon. The summer discount ends in a day or two.
