Requirement for online course

Thank you for who ever concerning about my question, I am actually looking for some opinion and procedures about further my study in computer networking field but because i am not US citizen or even a green card ( i am just a tourist and holding a valid 10 years of non-immigration visa ), that's why i don't have any SSN number.

I have been checking some information recently online for the online course but most of the college or university will decline my application cause of lack of information. Thus, does anybody know that how and where can i take an online course in US ? Am i eligible to apply for financial aid too ? Thank you ....