Hey dude, first of, appreciate chaps like yourself putting your life and life style out there for us civvies back here shining our butts on pc chairs at work, i'm an Aussie , we are all on the same team
Now for the real stuff
I went one country initially because i knew i wanted that Tiger first and foremost. I then changed and for every Gemran tank i researched i would swapout and do a Russian one, this was pre American line up. It's nice being able to swap between allies/axis as all the tanks have their strengths and weaknessess, i am saying this to a tanker lol..somebody slap me
Spading/maxing your tank out needs to be done to use the tank to it's full potential in so far as parts/fpe/different rounds at the very least. High tier spading can take a while.. a damn long while. I work on a mod at a time on the high tiers and then swap tanks so i can mix it up.
Sim battles, look for the Events option, you will get into a sim event withing a couple of minutes at most. Peak US times you it will be battle after battle with hardly any wait. RB Events are ok as well as there is no enemy icons anymore and the lineups between both events can differ a little bit.
Crews, work them up to Expert, Vitality, loading speed, targeting, commander skills first. After expert is pay to ace them. The crew slot you work the most on is the one you always put your main tank in depending on what matches you are going into so every tank from that nation benefits with that crew, then it is just a matter of experting that crew in the different tanks. I aced my Tiger H1 crew, those bad boys are my old dog veterans, and i try really hard to keep them alive come hell or high water.
Premium is the best value for money, a week is only 6 dollars or so but i guess it depends on your gaming time. A talisman on the tank you intend to use for a while is also a nice way to cream in the research points. Tiger/Panther/M4A2 76/Jumbo/T34 57/PZIV70..somewhere around that range as they are all capable of amassing a large amount of kills even when being uptiered. Depends which tank you gel with and are planning on using a lot.
Nice to see you here dude, enjoy
eDIT- I am Hetstaine in game and always play US servers so if you see me give me a shout out !