How to create free fire tournament app?

I am trying to create a free-fire tournament app but can anyone help with some ideas about how I can make the tournament like pubg?

You should watch this video:

And after that make necessary changes to it like pung to free fire.
Hope this helps!
If you stuck anywhere feel free to ask here.

i know this video but there is no option to create room in free fire so can you help me with that?

Are you sure?

the video link what u sent me is not opening