Nice progress on this...looking good. You certainly seem well tooled up for your first model, and your interior is looking great. Please use more detail about the problem you're having with the decal though...as it helps everyone out.
General procedure is to dip into water for about 30secs (I leave it in until the decal just about slides off the backing paper when I try to move it) then move it into place. Remove any air bubbles then soak up excess water with tip of tissue or you can press down on it with a tissue. Apply Microsol with a brush for contoured surfaces.