The most important thing is to bet for the added excitement, not because you think you can beat the bookie - and so you should only bet an amount you're comfortable losing if the game doesn't go your way.
If you've never bet before you might want to stick to something simple like the winner of the game, or half-time/full time. But you can bet on pretty much anything.
Betting Tips
My wife has never been glad that I make bets but my last pay off equaled to two thousand bucks and that made her change her mind. I guessed the score 3 to 1 in a Barcelona - Valencia football match. It was a pure luck but I also used the prediction from the site https://en.betadvert.com/. It was free and I decided to play with the fate - and I won.