NationStates

So I just joined today and been poking around but still have a few questions on my mind.
1) How do you make your population grow? Mine's at what I believe to be the starting amount of 5mil but I know more are needed to gain access to things like a capitol.
2) What are "raids?" I get the sort of basic idea through the name but I have no idea how interacting with other nations works.
I would be grateful for any help you can give me and I'm sure I'll have other questions before long.

Your population increases daily. No action required on your part (besides simply logging in, now and again, to not allow your nation to Cease to Exist)

"Raids" are when a group of nations move into a region and "endorse" one of their own to be delegate of the region, rather than one of the natives of that region.

If you need more help with anything, you can go right here and simply send a message to the moderators and they will help you greatly. It will take some time thought for a response in the "Telegrams" depending on how busy they are, but you will eventually receive a helpful response. Good luck!

Oii, and welcome to this crazy, yet lovely place!
In addition to a GHR*, you might also find answers in the FAQ (you will find them back whenever you need them by clickling the Help button on the left of the page, no matter what sub-page you're being on). They may answer most basic questions you might have.
Enjoy your stay!

*EDIT: Or rather, before you submit one.