Can someone explain to me a couple of things (more than one) obstacle immigrants faced when trying to access the pull factor that brought them to America?

it'll help get me on the right writing track I know there were many issues but I just need a little boost forward.

The pull factor is: something that attracts people to go and live in a particular place. Pull factors are responsible for dictating where migrants end up.

1.The sea, america would normally be hard to access for non-mexican immigrants due to the wide ocean blocking their way. They often take this dangerous journey across as they have no other choice.

Pull factors:

1.For most non-americans (like me), the country would probably be fantasized and thought to be a great modern country full of amazing opportunities. This may make them wish to immigrate to America.

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