Unable to complete assessment

I’m 32M going through my official assessment and idk why it’s been this difficult for me.
Normally when Im completing a PowerPoint presentation or assignment from school, I’m able to complete these without much of a hustle. I’m usually even completing them ahead of time because it’s be anxious about the work until it’s done.
But this assessment paperwork is different.
I’ve had the paperwork for months now but I feel like I don’t know a lot about myself. Especially the questions that ask about emotions, or feelings. The questionnaire would ask me to explain sadness and I feel like I don’t know what it is. I could only arrive at disappointment, worry, unfortunate circumstances, anxious feelings or something other than sadness.
This is just an example. But I can’t seem to complete these questionnaire for months.

And the past few months, Im trying to pay attention to myself; what I like, what worries me, where my strengths lies. But I feel like I don’t know myself at all. And yet assessment questionnaire is all I can think of since I got it.

Curious to know how you guys went through this phase