One way to help with the begining game doldrums (the begining does seem to be the slowest, once you get a few systems under your belt things get interesting) is to increase the amount of taxes that population pays. I make almost as much in income from metal as I do in taxes, when you figure that 1 metal = 2 credits. Almost all of it gets sold. Lower the amount of metal mines a bit, and bump the tax rate up from 0.3 to 0.5.
Also, if you increase the pop growth rate it makes the begining go way faster as well, and this doesn't really change anything in game except maybe how fast you recover after your bombed I guess.