Basically just cut your losses. Don't buy any military in the beginning, aside from soldiers which are mandatory. You'll want to buy some infrastructure (small amounts to start) and as you buy more, it'll unlock improvements. Focus on your income boosting improvements at first to help give you more money on hand. I started at 28% tax rate and haven't touched it since. Others may have their own opinions on this, but get the max money you can out of them because chances are they won't be happy in the beginning anyway.
From there, post on the Black Market or do what I did and just message a higher-strength nation looking for tech deals. If they have a spot open, they'd be more than happy to help you as it benefits them also. They'll send you money, you'll send them tech after 10 days, and so forth. This is your primary source of income at the start and probably 97% of the money you'll earn. The last thing I'd look into is trade circles. Form the one that best suits your play-style and just search for people with the resources you chose.
As said before - join an Alliance. This will make it easier to grow. Not only for protection, but guides. tips. and resources. Plus, this game is much more fun when you join in the social aspect.
If there's anything else I can help with, let me know!