Hello there! Welcome to SoM. Here we are a fun living pagan site, that strives to learn all about magic and some religions. Since your new to this magic site, I will not repeat hopefully what others have said.
However starting the basics is a must!!! In my opinion, these are the essentials to being able to understand magic. And as they say, knowledge is power. So if you want power, you must first have knowledge. So in my opinion I think theeee books will be extremely helpful to you. Like a lot!
The Wiccan cookbook- By Jamie wood and Tara Seefeldt (sorry it's Wiccan, it truly isn't)
The green book of shadows- Silja
Mythology -Edith Hamlin is a good and easy source.
Along with that, if your interested in any of the religions in this magic stuff? I would suggest looking at the oaths. Some best known paths are : Wicca, and Norse paganism (heathenry , odinism, Asatru) Here are some links for each, below.
Welcome to heathenry -LokisDottr
Asatru for beginners
Main Wiccan posts
So you want a teacher?-Lark
Some Amazing beginner articles are by awake too long and stuff. The two best I think, are the following.
The basics expanded
Anyways I hope this helped!