If I already sign up with google adsense, can I still sign up with amazon? if yes, how?

Yes you can be signed up for both. Here's a link to HubPages help section on how to sign up as an Amazon associate, and link it to your HubPages account.

Yes, you can. Adsense is owned by Google and Amazon is owned by, well, Amazon. Because these are two separate entities you can be a member of both..

Like being a Catholic and a member of the NRA.

Simply going to the amazon associates page and sign up there.

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.