Most sportsbooks make it quite easy.

1
Navigate to your desired game and bet type.
2
Click the "bet cell"
3
The bet will populate in your bet slip.
4
Enter your bet amount.
5
Submit bet.
Bet small amounts\n\n In gambling, betting small means you won't win big profit, but won't experience big losses either. Essentially, betting only small amounts helps you recoup your losses easier. Also, since virtual bets are unpredictable, there is no harm in playing safe by betting small amounts.