Which Lord of The Rings Movie Should I Watch For The 1st Time? Or Should I Watch The Hobbit?

Well?

I tried to watch RETURN OF THE KING extended version but it was 4 hours long and all I could think in my head was "what kind of movie is FOUR HOURS long? This is crazy omg" so by about minute 20 it was like I'd watched the 4 hours over and over and had to switch it off from exhaustion.