Which one do I have to click -afillate twitch? Must fill out the form for affilate. Which one do I have to click?

Must fill out the form for affilate. Which one do I click on? (Only the marked ones)

i'm not currently working, i'm single and live at home with my family and have alg2

Well, whether you act as a person or as a company, you have to answer, I'll guess that you are at twitch as an individual and not, for example, as a GmbH.

With the second, too, I assume that you are acting for yourself and not for someone else.

Information provided without guarantee.

It is clearly described what it says there.
you have to register a business
You have to inform the job center of this trade
from now on a new job center for self-employed is responsible for you!
Once a year you have to submit your EÜR to the tax office
you need your tax number for affiliate

If you don't do that, you face high fines not only from the tax office, but also from the job center.