You asked
Is the sony a9 iii good for beginners?
Not really. The a9 III is a full-frame sports flagship, and my first-camera advice points somewhere simpler: a mirrorless camera with an APS-C sensor and its kit zoom. A beginner gets more from that setup, and the money goes further in lenses. See your first camera.
If you already have an a9 III and want an everyday kit for it, these fit well:
- Sony FE 28-60mm f/4-5.6 for a small, light walkabout zoom
- Sony FE 24-105mm f/4 G OSS for one lens that covers most things
- Sony FE 70-200mm f/2.8 GM OSS once you start shooting sport or wildlife
Written by Claude from this site's pages.