Typically, you will need to download the software of the casino you choose to be able to gamble online, but some allow you to play online without any downloading. Just go to the website of the casino you wish to play and click to download their software. When you are prompted, save it to your computer and it only takes one to install it.
Understand that you should never be asked to pay for software. If you are asked to pay to download, then go somewhere else. You need to set up an account in which you can deposit money for wagering. This can be done through the use of the downloaded software. You will have a place to enter personal information and credit card information.
A bank draft or account transfer are other ways in which you can transfer money. Your information to the online casino the information is encrypted, no others on the Internet are not able to read it. You set the dollar amount to be deposited into your account and then you use this money to purchase chips for betting online. You can also contact the site operator to have money credited to your card but if your winnings exceed the initial deposit, your money is paid out by bank wire or by a check in the mail. Research and ask around before you chose an online gambling site.