Pretty vague question. What is your venture? Everyone scales their venture in a different way depending on what it is and what their skills are.
If you want to get into Internet marketing in general I think the easiest place to start is lead gen. Set up a website that offers whatever, landscape gardening, conservatory roof insulation, ideally something of reasonable value. Test generating leads to the site using PPC/FB. If it works, contact real businesses and offer to sell them the leads, or sell them the site with a retainer for generating them leads through it.