have to make money online

Sure, work OFFLINE! That is the surest way possible for you to earn your money to get married. But seriously, I really don't suggest that you will depend only on online earnings because it can never be that easy, not fixed and you need a lot of skills to do what it takes to earn serious amount of money. Finding a job is better since the pay is regular and you can be assured that you can keep your family's future. If you have money, you can venture for a business. But since you said you need money, I think the only way possible is to get a decent job, not online work, ahem, not unless your a professional photographer, a computer programmer , a white collared job that offers services to people online and owner of a site that has a tremendous amount of traffic.