How to Immigrate to the United States

Melissa Sue asked:

I am getting married to a American citizen, and I was curious on what the immigration process is like and how long would it take.

David asked:

What attracts modern immigration to both Canada and the United States? Is it similar? Why do people choose Canada and the United States?

rivalbulldog asked:

I’m in this debate in my spanish class and they assigned me in favor of illegal immigration and i need to know how illegal immigration would help the relationship between united states and the other countries, for example the relations between U.S and mexico or colombia or whatever
I have to say like how would illegal immigration benefit the relationship between the United states and Mexico
and it is very hard to look for benefits due to the fact that 99% of tthe internet is against illegal immigrants so any help would gladly be appreciated