Well first of all, do you have any experience? Do you have your own products to sell or are you going to sell other peoples products?
If you want to start an internet business then you would be better off doing affiliate marketing. Basically what you do is you sell other people's products online(you choose what to sell). For every product that you sell from them you get a commission (payment) the more things you sell, the more you get paid. This is probably the easiest way to get started.
If you're interested in getting started or if you have any questions feel free to send me a msg and i'll try to help you out.