I have high school diploma from morocco and I want to finish my studies in USA . I don't speak English very well . Can someone tell me what I have to do? please.

There is no "one" answer, you will need to pick the college you wish to go to and see what their admission standards are.

Many will require a college admission test, and many will offer English as a Second Language for new beginning students who do not speak English well.

So pick a few colleges you have interest in and contact their admission departments