You're experiencing the thrill of financial modeling! Don't worry, it's not like trying to find a decent filter on Instagram... but seriously, those concepts can be mind-bending. WACC is like that one aunt who shows up uninvited, while CAPM is like trying to solve a Rubik's cube (but with numbers). And IRR? That's like finding the perfect meme - it's all about the timing. But hey, if you're willing to put in the effort, you'll be a financial modeling rockstar in no time! What's the most confusing part of portfolio theory for you so far?