If you're interested in more stuff like Young Justice, the
current Teen Titans series, the one that started in 2011 with the rest of the New 52 is a great place to start. The 2011 Blue Beetle series is another great read. These two are mostly fresh starts, so you won't have to worry about 20+ years of history. And every now and then you get some cool crossovers, the most recent one is called
The Culling.
Each series is referred to as a volume, so the current one is Teen Titans volume 4. Just try not to get that confused with the fact that each series releases physical volumes that collect whatever the most recent issues are. Like, Teen Titans Volume 3 was 100 issues and released over the course of 12 volumes, but here volume refers to the actual book itself that collects like, 5-10 issues at a time.