I already have a Google Adsense account which was approved via E-Mail 7 days ago and Google ads are?

Create a new ad channel with Adsense and called it Hubpages. Use the code from this to set your affiliate code here. That way, you can separate your revenue from Hubpages from your revenue through Adsense on your own site or other ad-sharing sites like this one.

Yes, you should add the tracking code in, the ads that are appearing are not related to your adsense until you do so and you will not earn any commission for them.

Is the "Tracking Code" my Publisher ID number on my Google Account page that begins with "pub.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.