Reaper content was invented by SSG for those players that were so advanced that Elite was too easy and boring. If you're a new player however, you don't want to get in the ring with Mike Tyson. There's no shame in playing at Normal or Hard. The point is to enjoy the game and move your character forward, little by little. Learn the quests until you have them memorized. If you're getting killed in every game trying to play reaper, you will get frustrated and leave the game. This is what happened to me. I've been with DDO for years, but always got frustrated trying to overplay my character. Setting ego aside, I now play at the level that is challenging for my toon, but allows me to TR quicker without spending time at a tavern eating Enchanted Ghallanda Rations and losing xp by re-entering the quest many times after dying. Some of the more advanced players claim they can TR a character in 2 days. It used to take me 2 months, now takes me 2 weeks. I still only reaper at the lowest levels, and then not often. My goal is to reach a level where I can reaper comfortably. Who knows how long that will take? TR over and over with Completionist as your first goal.
Are you playing a melee character? Get a few barbarian and fighter lives under your belt. You can later use those lives toward triple completionist if you care to.
DDO is a game that is easy to play, but complex to play well. It takes years of game play to reach a level of excellence. This forum has been very helpful to me. The guys are very willing to help a beginner.
The easiest way for a beginner to level used to be to join groups, but that is difficult now, because most of the pickup groups reaper. So, plug away at solo, have fun, and don't stress reaper content.