As your EE profile has been created, you get the question, which province you want to settle. Write Alberta over there.it would be very helpful for me if you could little bit explain the point "Restrain yourself by checking the ainp box only and not others as it shows your intent to live in the province permanently." How can i show my interest to live in the province permanently? do i need to add any information in EE profile or i have to send expression of interest?
The second question is to check the rest of the province. You need to analyze, how will a province get to know your intent that you wanna settle in. If you check all the provinces, your profile will be in the pool for a longer duration and nobody will bother to see your file as you've shown intent to reside in all the province. The provinces determine your intent if you've checked one province or max 3. This is how you prove your intent.
Now the question regarding settling permanently in Alberta, it's not mandatory however in pnp schemes you need to live in a particular province for at least a year and after that you can change your province.
In a nutshell, living in a province for a year is mandatory if you have got your PR under pnp nomination.