Having difficulty finding python.h on OS X

[catsonmars]

What I've tried:
I've looked in:
/Library/Frameworks
/usr/lib
/usr/bin
I even looked at the python 3.9 folder in each of my pycharm ide projects and it isn't there.

I understand it's part of pydev but when I try to install through the terminal with:
pip3 install virtualenv I get
"error: externally-managed-environment"

what am I doing wrong? I've been playing with this 4 at least 4 hours.

[catsonmars]

Thought I got it but I didn't :(

[Pedroski55]

If you want to create a virtual environment, which many here would recommend, have a look at this link.

That should get you up and running!