Errors while installing gulp?

Question

Node.js

Greetings, I am a child of the 00s and it is hard for me to work in the console, in particular, solving errors and warnings
. But these warnings are infuriating, comrades. If there is, you need to edit it. As I understand it, he swears on the wrong path .. My mathematical base is not enough to understand

The PM is not recognized as the name of a cmdlet, function, script file, or executable program. Check the spelling of
the name, or if the path was included, check that the path is correct and try again.

In the future, when installing packages, similar things will also constantly come out.
In general, as I understand it, package.json should be created automatically, but there is only package-lock.json, what should I do?
Here is the log:
You can call me whatever you like, just explain what the problem is or throw a link to the description of the problem ..
Thank you.
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I knew about npm init, but get started doesn't say anything about it..