Wsalaam, oh that's great! Congrats! As long as you got a good deal, it's all good.
Regarding your PSN ID, it's pretty simple. Just keep following the steps mentioned on PSN, but make sure to set your Country as the US and your State as Oregon. The US Playstation store gets all games before other stores, and Oregon is a tax-free State so you won't be charged any taxes on your digital purchases.
When asked, enter your city as Fairview, and its corresponding postal code as 97024.
You'll get a verification email at the email address you provide when creating your PSN account. Hit the link in the email and your PSN ID will be ready to go.
Although you won't really need it, here's a video guide:
https://www.youtube.com/watch?v=hOOANbyDWIE
The guy in this video picks Los Angeles and California as his city/State, buy you should stick to Fairview/Oregon.