Help Installing OpenCV on Linux (im bad)

Hi
I am emberrassed to make this post but here it goes.
I have used RPis and python for a few years, but never really understood the difference between different python versions, the difference between pip and pip3 or most of the errors I get when I fail to install stuff.

I really want to get OpenCV installed, and I have tried a few times and read instructions on many forums. I have no doubt that OpenCV is great, as well as many of the instructions that I have read, and that the fault lies in me. It is so frustrating knowing that if a knowledgable person would sit at my computer for 2 minutes, everything would work!

So please help me to get OpenCV installed. I understand that to be able to help me, you need to know a few different things. Can we start out by someone telling me what you need to know and how I can get that info?

This is what I get when I try to install on my RPi 3b+ with pip:

pi@raspberrypi:~ $ pip install opencv-python
Defaulting to user installation because normal site-packages is not writeable
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/opencv-python/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/opencv-python/