The full enchiridion: https://classics.mit.edu/Epictetus/epicench.html It's a handbook so it's worth getting the cheapest copy you can find (literally just a couple bucks).
I will add Epicurean philosophy. https://www.epicuros.gr/pages/en.htm
look, hedonists trying to cure their self-induced depression! just kidding, I love this shit. stoicism just feels a lot more useful to me than hedonism ever did.
I do not endorse neither, i am just observing and learning.
I'm just joking