Your item level is fine. Normal dungeons can pose a fairly high difficulty because they can be entirely filled by new players, while more experienced players can take advantage of their other characters to bypass the content and move straight to Heroics and beyond. You can use the dungeon journal (ctrl+j) or the map (and then click on the boss) to briefly brush up on boss mechanics that might be giving you trouble.I recently hit level 100 and 4 new dungeons opened up. Any suggestions on which I should play first? I did Upper Blackrock Spire on normal and it was very difficult. Are they all the same difficulty? Did I just get a bad group or not play well or both? My ilvl is 597, should I focus on getting that higher first?