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.
Due to licensing laws and regulations within certain countries, Sportsbet does not allow the residents of persons located outside Australia or New Zealand to open or operate an account to place bets, or transact with Sportsbet.