Dear Amardeep and others intersted in the Topic'
When we have questions arie in our mind who am I? who is God? the real answres can only be found in Gurbani in itself and once we know from there ten there remains no darkness.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/sikh-sikhi-sikhism/8536-who-is-god-in-sikhism.html
Sakhi Baba Nanak:
When he went in Baieen Stream to take bath and did not come out for 13 days and the family thaght "nank" drowned and he finally emerged on the 13th Day of Kirya final righs. when all village and Brahmins were present and every one was delighted to see him and amazed as well. So when asked where was he Guru Nanak expressed that He was in communion with Nirankar the One Supreme (Akal Purukh). Evryone rediculed him and Brahman questioned hard doubting if he is crazy, and a direct question was asked to Guru Nanak "Tell us how does your Nirankar Looks like" so Guru Recited:
Mool Mantra
IK Onkar Satnaam Kartapurukh, Nirbhau, Nirvair, Akal Moorat, ......

and thus came the Japji Sahib.
The one you want to know is the only one for billions and trillions so how can you capture Him in one Name that is why in Gurbani Gurus said "Apna Guru Diayiye" "Apne Gur Ka sun updesh" So your intention to reach Him by what ever Name you know Him is okay. If you say RAM RAM RAM fast it will start siunding MARA MARA MARA and same if you say GOD GOD GOD it will start sounding DOG DOG DOG. Does that mean your worship wil be lessened by that no your Shardha and Prem will be the offering name is the support.
You Submit to Him yourself not the language name by which you know Him.
Sri Guru Granth Sahib Ji therefore has hundreds names for Almighty Lord. The matter is with belief and faith. You cry any name wihout faith it has no meaning.

If you are thirsty and you are served water by use of some Name you do not understand it will still quench your thirst because it is water what you want.
On the other hand if you are given something else but is called water
although its has Name water but it will not quench your thirst.
So is God's Name - Jisko Lagi Piyas --Naam Ki Piyas he only knows His reality.

So dear Friends Naam Simran is the only way to answer all questions automatically yes I gaurantee.

Regards
HP Luthera