There are dozens of websites (although I don't know if any of them are legit, or if they are just trying to take people's money) that specialize in helping international students get into US colleges. I'd have to do a lot of my own research before I'd be comfortable providing too much information. This is something with which I am not familiar.
If I were you, I'd read what I could find for free on the internet geared towards international students taking college courses in the US. You may also want to select a city where you think you would want to live. See what colleges are in that area and check out those college's websites. See if they have sections for international student applicants.
For example, if I look at University of Illinois in Chicago (Chicago is the nearest big city to where I live), they have a website for international students:
UIC International Student WebsiteOn that website, they have resources and contact information. You can then contact their office with all of your questions. I am guessing most universities get a lot of questions and they might be slow to respond.
I just randomly picked another university, NYU, and did a google search for "undergraduate international student application NYU" and that led me to
this page which has information for international applicants. They have links along the left side of the page with more information for international applicants.
I would suggest you start with this route of contacting a few universities in cities where you would like to attend. Find a contact email address for international applicants. Ask all of your questions in an email.
I would appreciate if you could update me on what sort of responses you get, as I'm sure that would be helpful for others with similar questions. I'm guessing most of the websites devoted to helping international students are just companies that take your money in exchange for giving you advice and helping you navigate the application process. My guess is you can do it yourself with the help of an advisor from a university that accepts international applicants. Perhaps if there is an experienced company, they could maybe help direct you towards the proper college based on your goals. I don't know enough about the field to be able to recommend such a company.
Best of luck.