Please help us help you and fill where relevant:
Your LimeSurvey version: Community Edition   Version 6.2.5+230828 
Own server or LimeSurvey hosting: Own server
Survey theme/template: Don't know. Default
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Hi, after making a question, and setting its type to Multiple Choice, I searched in vain for a place to enter potential answers. I couldn't find it, so I looked up a tutorial video. It had some buttions I can't see about making an Answer Group. But I don't see that button on my installation. What I see is attached.

I was expecting to see buttons like this from the tutorial
ibb.co/Yh2jpvQ

Hi,
what do you see when you click the big green buttom "Edit"?

Yes, this...
 

Many parts of the tutorial still show screenshots of version 3.x.
But the tutorial is a wiki.
Anybody is free to contribute to LimeSurvey and improve it. 

Joffm

 

This is what I see.
Are subquestions supposed to be answers to multiple choice?

Looks like "subquestions" are actually Answer Options.

Is that right?

Confusing nomenclature.

Single-choice questions have answers - they only require a single column in the database.

Multiple-choice, multiple-short-text and array questions have sub-questions as they require a database column for each sub-question.