Yeah, to help you need to know what happened to cause your death. General newbie help questions for dungeons are: is your gear up to date for the dungeon level and are you following the tank and only attacking things they have pulled? Are you using your AoE rotation (basically Fire II on that level) instead of single targeting monsters (when at least 3 monsters alive), and are you using Diversion / Lucid Dreaming to lower your enmity if needed? If so, there isn't much you can be doing wrong.

Maybe you accidentally ran ahead and pulled extra monsters for the party, or ran into the traps in the dungeon with low HP, or got hit by some boss mechanics you aren't sure how to evade? Let us know more and we can hopefully help you.