Hi there. First of all, congrats on the lucids!
I recommend checking this out: http://www.dreamviews.com/f14/mancon...niques-118384/
Remember that dream control is different from lucidity. You can be hyper-aware, yet have no control. And you can have the best control, yet not be lucid. Don't worry about flunking at going through the window, your dream control will get better in time. Just have confidence and know that YOU are in control and YOU WILL go through the window. Try not to doubt and think "I hope I will go through", instead, think "I will go through!".
As for the blurriness, have you tried rubbing your hands or stailizing the dream? That can increase dream vividness as well as anchor you into the dream. You can also try yelling "Clarity now!" or any other commands that you think might make the dream more vivid 
http://www.dreamviews.com/f12/ninas-...torial-118317/
Hope this helps. Good luck!
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