Start with the courses to see if something grabs you. If you want to learn more about Chaos, take a look at a link @tracyS started here.. The Chaos path is… well… chaos. It has a lot of very difficult to follow books but after you distill it down, it becomes much easier to figure out. You do not need to suffer the esoteric books to do Chaos.
Short version of what Chaos is to me
There are about 4200 active religions in the world. There are many times that number of inactive ones. Billions believe in Christianity. Billions are followers of Islam. Millions in other religions. Most believe in exclusivity. They can’t all be right. Conversely, denying their beliefs outright is also exclusivity. They all bring power and good in their own way.
The end game on this approach is to be aware of what is out there. Discussions about whether there are many spirits, one spirit or no spirit but just energy are salient and build awareness of the whole approach/picture. Are They All The Same?
Chaos, to me, is a system to explore those ideas. It is ‘OK’ to connect to a belief, or spirit, or deity, or energy if that blows your knickers up 
. It does not practice exclusivity. My approach does have warts but that is common with all systems.
Meditation skills are part of Chaos (and other paths) so if you want to practice those, the different candle meditations are excellent and easy. Here is the white candle meditation but you can search and find several others on the main section (not the forum). The visualization part of the meditation is a precursor to building mind castles - which means mind castles/palaces are not hard - just a bit confusing when explained poorly.
The book I recommend if you get this far is:
