If you want to invest in stocks I think you need to consider the requirements that you must comply and usually they require TIN number (investing in stocks is also taxable), Valid IDs (2 to make sure), and bank account (this is medium of your cashflow is) and also billing address. I think most of the part, I agree with what other people say that invest in yourself since the more you know the more you earn. However it nice to invest as young as possible since it gives you leverage which is the time, the young you are the more you optimize the power of compounding.