i have had a rough time getting my scripts to work on my raspberry pi zero w and the last program i need installed requires selenium. This script was designed for windows 10 + python 2.7 because i make my scripts in this environment. 
I was wondering if it is possible to use selenium on a raspberry pi zero w and preferably headless if possible.
I can't find any info, help or guidelines online anywhere and have no idea how to use pip in raspbian (if it even has pip).
I don't see why you couldn't. You can install pip with apt install python-pip, you'll probably need to sudo that command unless you login as root.
Then you can just open a terminal and use the pip install command to get selenium. If that doesn't work you can try running python -m pip install instead.
Selenium (Maybe headless) on raspberry pi zero w