If this is your first image, it's a pretty good start. The general concensus is that several ( many ) shorter subs would get better results especially in light polluted surroundings. Also using an light pollution filter would cut down the skyglow considerably.
The image is framed nicely and the stars look round enough so try taking something like 20 X 2 minute subs and stacking in Deep Sky Stacker ( freeware ) or any image processer that will stack images together.
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