I had to answer this.
First of all, I don't want to mess up any faith you might currently have, but hell is not eternal. Please see:
http://quransmessage.com/articles/is%20the%20punishment%20of%20hell%20eternal%20FM3.htmSecond of all, you don't need to believe in Muhammad's alleged ascent to heaven or any of that fluff. These things are not in the Quran and are based on the corpus of hadiths/sunnah. Muhammad did not split the moon. The Quran is the only legitimate religious authority:
http://quransmessage.com/articles/god%20has%20warned%20believers%20to%20only%20follow%20the%20quran%20FM3.htmThe Quran's ideology is simple. God is one. You have to believe in Him to attain peace and happiness. Ritual salah can be performed in any way that works for you. It does not need to be an act. You don't need to have a set number of rakahs for every prayer. You can improvise. Please see:
http://quransmessage.com/articles/quran%20salaat%20FM3.htmPrayer can take many forms.
Also, your heart is obviously not sealed, because you are pretty close to recognizing the truth of the Quran, and you seem to want to believe in God.
The Quran is a miracle in itself because it completes the chain of divine books and prophethood. It has a lot of other interesting attributes if you want to look deeper. No one has ever produced a chapter like one of the Quran's. If you want proof of this, I can provide it in due course, God willing.
I've felt the way you described before, but if you pray and ask God for guidance, He always gives it to you. I know from experience. I am happy to say that I recognize the truth of the Quran now. (It took ages, though.)
God must exist for the universe to exist. The universe had a beginning. It's only 13.5 billion years old. Something existed before the advent of the universe. That was God. God exists outside of space and time and He is the originator of everything. No other theory makes sense. If God didn't exist, then you wouldn't either.
God had no beginning, since He exists outside of time. This might seem unbelievable, but it's true. You know how time bends and slows down around black holes? This phenomenon is not something we can comprehend, but it happens, and physics has proven it. God's attributes are a bit like that.
Heaven does sound a bit too good to be true, but trust me, it isn't. God can create whatever He wants, including Heaven. It might seem far-fetched, but think about the world. It has been designed with a purpose. Moral laws have been designed for a purpose. We are all being held to account for our sins. Otherwise life would be purposeless and God would have created the world for no reason--but God has a reason for everything!
If you have philosophical objections to the concept of God, I can probably answer them, no matter how strange they are. Trust me, I've been there.
If you pray and fast without true belief, you can probably still go to Heaven in my opinion, but that's no fun. You're eventually going to need something more. Don't submit to a life of mechanical prayer. It's incredibly boring. Please do investigate and learn more.
http://www.thewaytotruth.org/theholyquran/wordofgod.htmlhttp://www.reasonablefaith.org/does-god-exist-1 Good luck