Choose a White opening by the positions you want to learn, the time you can study, and the replies you are willing to face. There is no single best choice for every player. Playing 1.e4 often opens lines quickly, 1.d4 offers many sustained central struggles, and 1.c4 or 1.Nf3 can preserve flexibility. Each choice still requires concrete answers to your opponent's moves.
The Italian Game makes development and tactical pressure easy to see. The Ruy Lopez introduces longer battles over central control and piece placement. Both require Black to answer 1.e4 with ...e5 before their defining positions arise, so an e4 repertoire also needs plans against the Sicilian, French, Caro-Kann and other defences.
After 1.d4, the London gives White a recurring development scheme, while the Queen's Gambit immediately challenges a pawn on d5 with c4. Neither removes the need to notice threats or different Black setups. The English and Reti suit players interested in flexible move orders, but flexibility can increase the number of structures you must recognise.
Try a short line from two openings, then play a few games with each. Record whether you understood the resulting positions, not only whether you won. Keep the opening that gives you useful decisions to study. Add alternatives once your first choice feels familiar, and use the repertoire builder to limit daily practice to lines you actually intend to play.
Try this at the board
Compare the Italian and Queen's Gambit trainers. Which central pawn challenge can you explain more clearly?