I want start investing in stock. Where and how?

I'm 18, my source of income is from my parent (Not important) but the important part is that I spend little money with mean i have spare change in the hundreds.

I'm now feeling curious and want to try investing. I want to start at around RM100 (if too little, dont insult. Just tell me).

Heres the elaboration for the question in the tittle of this post:

1. Where can I invest my money on stock? What website, apps or place?
2. How do i invest? Do i need to make calls, account, go to a building write and sign stuff?

Please tell me with honesty as I want to do it.

I already know about the basic and how politics shape the market so dont need to tell me again.

Thank you for your time