Photos taken at one angle and in uncertain light limit what anyone can say, but what you describe, a straight nose that looks somewhat bulbous from the front with large nostrils, is a tip-and-base problem rather than a bridge problem. A feminine nose usually reads as a more refined tip, nostrils in proportion to the rest of the face, and a smooth, gentle line on profile, not simply a smaller nose. Bulbousness can come from wide or convex tip cartilages, thick skin, or both. Cartilage can be reshaped with sutures and conservative trimming, while thick skin limits how much definition is realistic. Large nostrils may be narrowed with a modest alar base reduction, which leaves small scars in the crease where the nostril meets the cheek. When the bridge does not need to be touched, a tip-focused rhinoplasty can be a less involved operation than a full one, although "not too invasive" should never mean under-planning the structure. I would suggest an in-person consultation, with front, profile and base views, with a board-certified surgeon who does a great deal of rhinoplasty.