Quite good for a first try. The circles are called repellancy spots and can come from either grease or oil spots on the plate or insufficient wetting agent in the emulsion. Often a wetting agent like TX100 or TX200 are used at about 0.5 cc / 100 ml of 10% gelatin. You can also use alcohol, but it is less efficient.
The low density is common with unfinished (sulfur treated) emulsions or with emulsions that are too dilute.