Agree with you Hulk.
Once you 'submit', it is like a roller coaster ride. Exhilarating! Whatever the situation, you are firmly on rails and secured in your seat. It is when you 'fight' it that you don't really get to 'enjoy' the moment(s).
But your question, Laura, is like, how can I be certain? What is the proof? Everyone has that question.
To understand Allah and his message to mankind, read about the 25 prophets. It makes you see the consistencies and the real purpose. It is about accepting no other than Him as the Lord and doing good. We have to earn an honest living. That would be a start. Perhaps you will be inspired.
It is all in you, what you want to see, you will see. What you don't want to believe you won't believe.
The Quran and the 'sunnah' has remained. As a 'Seal' it's a sure sign of Allah's protection and it does not need another prophet to correct the message even after 1400 years. That, in itself is a miracle, or that everything the prophet did, it mimicked around the world to a varying degree. Do you want to know the message? Do you want to find out?
He sends the signs, perhaps repeatedly. We chose to ignore. We will be questioned of those too! Especially if we complain

So easiest way is to say hey, if Allah says the story of mankind started with Adam (pbuh), why not give it a go? Read it and proceed from there.