Gaming mice differ from regular office mice mainly in sensor accuracy, button responsiveness, and ergonomics. For beginners, the most important factor is comfort: if the mouse doesn't feel good in your hand, you'll perform poorly. Grip styles: palm grip (whole hand on mouse), claw grip (arched hand, fingertips on buttons), and fingertip grip (only fingertips contact). Most beginners start with palm grip, so a medium-to-large ergonomic mouse is recommended.
Wired vs. wireless: Wired mice are simpler, cheaper, and have no input lag or charging hassles. Wireless mice offer freedom but require batteries or charging; modern wireless is nearly lag-free but costs more. Beginners should typically start with a quality wired mouse under $50.
Sensor: Most gaming mice now use optical sensors that track well on almost any surface. Specs like 16,000 DPI are overkill for beginners; 4,000 DPI is plenty. Just ensure the mouse doesn't skip or spin out.
Weight: Lighter mice (under 70g) are trendy but harder to control for novices. 80-100g is a sweet spot.
Software: Some mice require software to adjust settings; choose one with intuitive software (e.g., Logitech G Hub, Razer Synapse) that lets you change DPI, button mapping, and lighting easily.
Realistic expectations: A $30-50 mouse will serve you well for months; you don't need a $100+ mouse to enjoy gaming. Focus on learning mouse control and game mechanics before upgrading.