I see some mistakes, but I also see some decent work for a first time build at this level. I would suggest that you teardown this model again, or start fresh and build the model with a little more patience and care. treat each part as an individual model and try to get that part as perfect as you can, work with clean hands, and when you paint use care to keep the model as clean as possible, also use the same paint type the same brand. if you use Enamel Or Laquer always stick with one (dont mix). Get a large cardboard box to spray your model as kind of a paint booth, if you paint outside, as most us do it will help keep the dust off while drying.
Gabriel