Get nitrokey. Check

I’ve got and updated my nitrokey 3a
Ive installed python on my windows 10 pc I think.
How do I install nirtopy.
Every time I try I find that there is another file dependency and another and another.
So frustrating.
I plugged it in for the first time, went to see if it works using the auth checking tool
It asked me for a pin, I entered one without thinking and now I think I’m stuck with it. It’s only 4 digits long.
Can I change it, do I need the nirtopy to do it?
Please help…

Never mind. RTFM what I should’ve done.