Where to start with python 3 jupyter notebook

Hi guys, I am really new to python and programming with python. I understand this code and really want to use it to extract tweets for my research. However, I do not know where to start. When I try to install or import folders, packages, models I am getting an error. I don't know what to do now.

Is there someone who can explain to me the first steps (the installing and import commands) or maybe someone who can record their steps and share the video with me.

I am starting to get desperate, so any help would be grateful!