Read the meditations by Marcus Aurelius. It is an excellent beginners choice for studying the philosophy of Stoicism. May it help you on the journey towards living a virtuous life.

Here is the EBook version.

https://www.gutenberg.org/files/2680/2680-h/2680-h.htm

Here is the audio book version.

https://librivox.org/the-meditations-of-marcus-aurelius/

Here is the physical book version.

https://www.barnesandnoble.com/w/the-meditations-marcus-aurelius/1116748287