Psychology isn’t exactly a “Hard science”, but I still think it’s important to know the basics behind your own mind.
It will give you a better understanding of yourself and how you think, even about harder sciences, and the Neuroscience part of psychology does contain some chemistry and if you have a chemistry background it’ll give you a deeper understanding.

Psychology is a very memory (pun intended) heavy subject, and therefore I have chosen to provide written notes, as it will make it stick.
Underlined words are the most important words and ALL CAPS words are also important but not crucial.
I have made a Google Drive Folder with all the Psychology Notes you’ll ever need:

I have written the first two parts of Psychology out as online notes provided below:

Also below is a homemade model of a Neuron, which you might need, as the one provided in the notes isn’t as detailed: