Light of the Jedi by Charles Soule is the initial book that lays the groundwork for the era with all the characters and such. It reminded me of reading the Song of Ice and Fire books for the first time with the sheer amount of characters introduced. Personally I just had to google characters a lot to get an idea of what to visualize them as. Lots of names, but its worth it.
View attachment 124982
After that you have a couple diffrent ways you can go. The adult novels tell the core story of the era, with the Marvel comic filling in important gaps. Then you can read as much as you desire. The YA novels, middle grade books, and the IDW young readers comic all have characters and plot points that move from book to book. Personally that's whats made me read them all.
Here's a handy guide for choosing what to read after Light of the Jedi.