What 'good' looks like for a small site
For a site with authority under 30, target keywords with: volume 200-2000/month, difficulty under 35, and clear commercial or informational intent. That's the sweet spot where you can rank in 2-4 months with good content.
Ignore keywords with volume over 10,000 — they're dominated by big sites and won't yield results in any reasonable timeframe. Ignore keywords with volume under 100 unless they're transactional ("buy X in Y city") — the traffic isn't worth the effort.