It's a good thing that you already know that plenty scammers will contact you. What's the need of asking someone to bet for you instead of simply doing it yourself. There is no professional sport gambler who will not loss before winning (or else if they already know the score of the match before its being played). Why don't you use the small amount of money you intend to start with to learn, soon enough you will be a master too.
I think OP has a good idea but he is looking at wrong place. If I was at his place, I would have been contacting people locally who do not have much idea of online opportunities and then utilize the skills of that person. A friend of mine tried dong this with an exceptional guy but that guy rejected the offer at first proposal only.