Okay lets start,
First of, you have to understand that sports betting is not about winning a 100x bet, this is actually the game of winning 6 out of 10 2x Bets similar to Stock or Crypto Trading.
If you understand this, you must also understand that being successful at sports betting is built on 2 factors:

- Bankroll Management
- Researching Picks

Bankroll Management is actually easy if you're a discipline person, basically you have to work with fixed Units per Bet, and deciding which avg. Odd, you're trying to hold.
I suggest you follow a avg. Odd about 2.2x and a Unit(1 Unit = 1% of you bankroll) of 2-4 per bet. 

For Researching Picks there are many Options but I suggest you just follow a Free Tipster, for getting your Picks.
Use this Tipster (Discord Link) to get daily Predictions

As you can see the only way you're going to lose Money in Sports betting when following a Tipster Service, is if you fuck up your Bankroll Management this means: Rage Betting, doubling the stake if you loose or random all in bets.