how to get started with level 2 - please help

I just passed my level 1. i am in a dilemma if to sit for level 2 in May or later. And which prep provider is best for level 2. MM worked for me in level 1, i didn't go through the whole CFAI curriculum…. just watched MM and did the practice questions. only for the topics i found hard to understand i read from the CFAI LES.

is level 2 tougher? and what way works best for level 2?