well my first sports bet was back in 2000-2001, I am pretty sure there were 4-5 matches combined (definitely had Lazio on it), those were great years (odds were more logical and sound), was easy to earn money. Nowadays its tougher, those safe bets come with silly low odds, and I allow myself to say safe bets don't exist.
I don't remember my first sports betting but I know only one thing in the starting the first gambling will be definitely giving a loss for me so all people get into gambling will definitely interested in to get more money but the fact is we don't get much more profit in gambling.