One thing that helped me: embracing the difference! The controlls feel different, enemies behave more agressive so you can't really go in from DS1 and dominate the place. I was surprised how much times I failed even in early areas. So...prepare to die while getting used to the new engine.
Other than that, the world is HUGE. Not as intertwined as the first one but chock-full of bosses, areas and surprises. The flask system is back but life-gems certainly help in stressful situations. The game was designed around people using those, though. Early in the game your flasks are
very limited.