Had heard a lot of good things about Demon's Souls, but I don't think I was ready for the difficulty. No pauses! I don't think I've played a game this hard in years.
Keep at it. Level 1-1 is a trial by fire. It took me about 3 days with multiple sessions of a couple hours each before I could finally play all the way through without dying. After completing 1-1, you'll be able to cash in souls to level up your stats, and grind if you feel the need. If you want a break, play as a royal, it's the easiest starting class.