How to apply as an immigrant in canada

[a3longabela]

I am 27 years old working in iran as a staff and I'm planning to apply as an immigrant. What is the first thing I have to do? Because like what I've red regarding the Provincial Nominee Program, province of canada like alberta is different to the program of other country like manitoba which is the government are the one who is looking for job for the nominee unlike alberta the person who is applying for PNP should look for an employer to apply the PNP program. I have a lot of relatives in alberta, but even them they didn't know what they are gonna do to help me to go to alberta.