New Player tips ?

[Keithandor]

Any tips for a new player ?
Size of game (number of units) for two players to finish in a reasonable time , lets say 60 or 90 minutes for an intro game ?
Has anyone done a spreadsheet for making up some roughly balanced forces ?
What other rules systems could you use to pinch scenarios from ? If you have played Battleground WW2 , would those sized scenarios be OK ?

Thanks
Keith