Something about Livestreaming (ie in gaming)?

I would like to live streaming Fortnite, but I do not know how. Can you help me?

If you stream on pc, then I would recommend you streamlabs.

Had you referred to twich. Now the question is whether on the PC or on the console.

I'm a PC player

Have fun times looked on Youtube. Here are tons of tutorial videos on how to learn and what you need. Believe that would be wiser to enrich yourself and learn something.