Hi Seeker. I struggle myself with understanding the Word sometimes. But what happens is I will pray and ask Him to help me understand, and let it go. If He thinks its of vital importance for me at that time, He will usually find a way to speak to me and give me some answers. I've had Him speak to me through song, tv, church, other people etc. One thing I have noticed though, is often God will speak to me using my own thoughts. For instance, I'll be mulling over something, and in my own voice, He will interject a thought that is totally not my way of thinking. It actually makes me go "whoa, okay. I would never think like that, or choose that, etc. So it must be God."(As long as it lines up w/ the Word) Personally I think if God's voice voice boomed down from heaven it would freak most of us out. He uses our concious, too, but usually if we aren't raised as a christian, that gets muddied up to some degree.
As someone posted earlier, when we become a christian, the devil isn't happy about it, and for some he will do everything to make you stop believing. It happened to me. Just like when I was delivered fom alcoholism, which happened before I got saved, I was all excited and thought my life would be so great now that I didn't drink anymore. Fell off that pink cloud, really hard too. I came to realize how messed up my life really was, and that I had alot to make up for.
Don't be so hard on yourself, we can be our own worst enemies sometimes. I too take alot of comfort in King David. He messed up badly, but he still was a man after God's own heart. In the NT, Peter Denied Jesus three times, but became the rock the church was founded on. Keep seeking Him, and you will find Him. If yu miss Him, don't worry, He knows where you are, He'll find you. I'll keep you in my prayers.
P.S. What translation do you use? If English is your second lang. (which I wouldn't have known, nice job.) a different translation may help, such as New Living Translation.