It is important that you just keep up with the basic options in life. Like, you can consider Danakil Erta Ale & Omo Valley Tribes Tour and Travel and this will have lots of choices also. Just choose something that suits your needs as well as the budget and then take the final decision. Trekking can be fun and it will really take you a long way. You will get energy to do the same from the motivation that you get from nature.