How Do I Begin Modding A Galaxy S4 From Sprint?

I have a Samsung Galaxy S4 SPH-L720 from Sprint, running Android Lollipop 5.0.1 and the stock Samsung ROM pre-installed on the device. I look forward to modding it with Cyanogenmod, but I am not sure what resources on XDA will help me to achieve this goal successfully, being new to this site; and I have never modded a phone before. Because there are risks involved with modding, I prefer to receive direction from a Respected Contributor.

I am comfortable with learning how to mod, and if there is anything I must know to avoid making a mistake when modding, then please let me know. Also, let me know if you need more information about my device before directing me to the proper resources.

Thank you.