Good advice so far (even if NNy's is a touch...........'arbitrary'
)
My advice, i'm afraid, is a little more onerous.
The only way to figure out this universe is to amass as much reliable information as possible, 'digest' it, and then think deeply about what actually make sense.
The hard parts are 'the amassing', knowing 'reliable' when you see it, and 'thinking' (in other words all the above).
Discard all religious texts first, as they are based on ancient traditions and problems that do not relate to the world of today; then through your search you will recognize many ethical values, worth retaining, that you may connect to Islam or other religions which are axiomatic ways of behaving which have positive survival value in any creed.
This is really a life time 'proposition' but it is promising that you have begun the process.
And in my experience, once you have had the wisdom to discard religious dogma, the journey toward understanding is greatly simplified. (just don't throw out the wisps of 'inherent wisdom' contained in most widespread religions, with the 'nonsense').