Beginner scuba divers should prioritize buying a mask, dive computer, and fins first. Investing in quality gear within your budget is crucial. Popular mask options include Cressi F1, Aqualung Reveal X1, and Fourth Element Scout. Dive computer recommendations are Mares Puck Pro, Suunto D4i Novo, and Shearwater Peregrine. For fins, options like Aqualung Storm, FE Rec, and Mares Quattro are versatile choices for beginners.