Bibo,
What i understood abt the process is after applying and clearing your Medicals. CIC will request for your passport to stampo a visa on which the expiry is in 1yr. So u have to land in Canada before that expiry. Which can be a 5 day vacation to canada. and I guess u can land anywhere in Canada. once there u have to apply for your PR card, SIN and health insurance to be sent to a local address (u r friends address). You have to be in Canada for 2 yrs in 5 yrs from the date on your PR Card.
So , after you visit canada you will have 3 yrs to be anywhere in the world to keep your PR status current.
Now Alberta gave you the nomination in good faith assuming you will make Alberta home and build its economy and they will contact you to see how it is working for you. But you will have the freedom to move anywhere.