I totally agree with Pysah. Once one can understand the attributes of Allah subhantallah, the Creation and how we came about, alongside realising that Allah subhantallah cannot be confined, then you will begin to find some satisfactory answers.
As you delve more into this area, you will find that even language poses barries. One cannot truly express the greatness of Allah. We can but attempt to but it would not really do justice to the excellence of Allah. For example, Allah is trascendent (not limited by time or space), omniscient (all-knowing), omipotent (all-powerful), omnipresent (all around us/is everywhere) and incorporeal (without the limits of a physical body). This theological language cannot be used for us mere mortals. Once I understood this and Creation, I have felt content with my faith, in that, by understanding the difference between the nature of man and the nature of God, there was a realisation that one cant really question God's motives as one would question a human's motive.
The flawed nature of man vs. the flawless Creator.
Mortality of man vs. the Immortality of God
I am still trying to find some literature for you with regards to this, so please do bear with me. I have read a lot of work by the great thinkers such as Descartes, Kant, Plato, Swinburne- they give some excellent opinions on what they think the nature of God is and the idea of why I am here/purpose of life. I don't think it hurts to see what others think on this topic.