When I started gambling on sports, I used to play the parlay, moneylines, and all kinds of stuff like will the person score over a certain amount of touchdowns in a season, but I think, like most experienced sport's gamblers, I'd say to pick straight bets.
I've studied trends, numbers, stats, and no matter how much you study, it doesn't mean you will make a profit. Lots of it is luck. I wouldn't advise trying to make a living out of sport's gambling, unless you have a lot of money. But if you think about it, if you had lots of money to begin with, why would you need to try to make a living doing sport's gambling.
So my advice is to gamble mainly because you're interested in it. Just like you may be interested in anything in life. Try to set aside the amount of money you are only going to use for gambling, so you don't go bankrupt. For example, you set aside 2000 dollars to bet with. You make money, great, if you lose the 2000, so what. It wasn't for anything else besides gambling.