How to buy bursa saham?

Excuse me, could you please elaborate on the process of purchasing shares on Bursa Saham? I'm quite new to this and would appreciate a step-by-step guide. Do I need to open an account with a broker first? What documents are typically required for the registration process? Are there any specific trading hours or fees I should be aware of? Lastly, how can I ensure that my transactions are secure and my investments are protected? Thank you in advance for your assistance.