Please provide sm guidance to avoid complications

[super8]

Message: hi em currently in USA on H1B and want to get info. on Canada immigration.
I want to file for skilled worker only for me, once i get approved i will go back to us and finish my current contract job which will be over in 1-2 years.
IF i am a permanent resident and i have not stayed in canada for past 2 yrs after getting my PR, now i want to move to canada  and i want to file for my spouse and my child how long will it take and do i have to stay in canada or i can stay in USA and we all can come together to canada once they get their visas.
please porvide me with the info as em willing to do so.