There are several different Internet marketing experts that you could learn from in order to get your own business started. The first thing you need to do before you go looking for Internet marketing experts is find out exactly what it is that you want to do online, make absolutely sure that there's a market for it WITH at least some competition and then find out who is doing what and how well. You must have direction if you expect to accomplish your goals and there must be a market for whatever item or service you plan to offer, otherwise, you're dead in the water before you ever get started. Competition shows that people are having some success in the niche.
The qualifications that you might want to find in Internet marketing experts are how long they've been successful, apx. how much money they're bringing in on a regular basis, how much they charge to mentor someone and if they do any coaching or consulting at all. Some experts have gotten out of this area because they got tired of tutoring others, only to watch their students go out and exceed their own income. You can buy good online courses or ebooks for just about any topic you can imagine, but one on one coaching can be expensive. I've seen one expert in the Internet marketing niche that "only" charged $100 an hour. Most were in the range of $250-$500 per hour and I've seen some specialized trainers, such as Google Adwords expert, Perry Marshall, that cost over $700+ per hour. When you're are looking into getting coaching from Internet marketing experts you'll want to keep all of this in mind before you get started.