Who is Allah and how can i feel his presence?

 Who is Allah and how can i feel his presence? 

Alhamdulillah, the word Allah came from Al and ilah meaning The God. 

Al is definite in Arabic specifically used to something alone. 

To know Allah, the Quran talks who Allah is. 

Allah says in surah Ikhlas surah 112;1-4,

Say:  He is Allah, One and Only. 

Allah is Absolute, Everlasting. 

He does not begeth neither is he begotten 

And there is none unto like him in likeness... 

Allah is alone and he also alone manages the affairs of his creations. 

No one created Allah neither was he given birth to but he existed infinity. 

Just as we know we have infinity, Allah is there forever. 

If we believe there is infinity, something without end or beginning why is it had to believe Allah is infinite and forever 

Allah says, 

Ta Ha 20:111

And [all] faces will be humbled before the Ever-Living, the Self-Sustaining.[1] And he will have failed who carries injustice.[2]

And to feel his presence is to be constant in remembering him, reciting Quran and engaging in the prayers. 

Allah is always present with us with his knowledge but his siffat is above the heavens and earth. 

There is no two or three or four people that will meet but Allah is next. 

Allah says, 

Al-Mujadila 58:7

Have you not considered that Allāh knows what is in the heavens and what is on the earth? There are not three in a private conversation but that He is the fourth of them,[1] nor are there five but that He is the sixth of them - and no less than that and no more except that He is with them [in knowledge] wherever they are. Then He will inform them of what they did on the Day of Resurrection. Indeed Allāh is, of all things, Knowing.

So the knowledge of Allah encompasses everything.