How to meet the requirements for a visa ?

[ElleHarries]

I am planning to study University in the United States. However I've heard a lot of peole said that getting a visa to study in the United States takes a long time, and it is really hard.
I need any information about How to meet the requirements for a visa ?
Thank you in advance!
(I am so sorry I am a newbie so I don't know where to get valid answer for this question)