Too Many Sources, Too Little Time.

I'm an aspiring Bible scholar. I haven't started going to school yet, but I choose to read books related the Bible and theology in my free time. I have noticed that on every specific topic I read about, there is a seemingly endless amount of books, research papers, and other academic resources on the subject. Every source I read leads to at least 30 more. I feel like I could study one topic for the rest of my life and never reach the end of the rabbit hole. How do academics wade through it all, decide what's worth reading, and what can be ignored? How do you decide when you've done enough research into a particular topic within your field of study?