How much prep: Current MBA, Econ & FIN background

I am taking L1 in December; my undergrad major (2006 grad) was economics and I minored in finance. Also, I am in my first semester of an MBA program that will give me 2 finance courses before I take the L1 exam. I have not worked in the finance industry . Has anyone with a similar background taken L1, and if so, what was the effect on your study hours? I am brand new to the forum. Any advice is greatly appreciated!