Affiliate Marketing Secrets

Hello:) Thanks in advance.
About me:
I’m a legal full-time international college 19-year-old student in California.
I’ve made a website the other day and am wondering if I would be eligible to earn some money by signing up Google Adsense.
I worry about paying income taxes.
I don’t have SSN.
Is it very difficult to get one?
I don’t want to get into trouble.
Any advice is very welcome.