Everytime we bet on sports there's always what we called a betting odds, either the over/under, point spread, and the moneyline and they offer different payout on different odds they offer.
If you will just analyze and choose which team will win, well, I guess that's easy because you just have to bet on the favorites all the time.
However, you will not be getting a good payout as mostly the odds are below 1 which you will get less than 100% of your winning compared to the amount you bet.