Start with the Bull Call Spread or Bear Put Spread depending on your directional view. These are the clearest bridge from single-leg to multi-leg trading:  

• They use exactly two legs — easy to understand. 
• Both maximum profit and maximum loss are strictly defined. 
• The premium cost is lower than a naked long option. 
• The payoff chart is intuitive — a clear profit zone with a flat cap.  
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Once you are comfortable with spreads, the next natural step is an Iron Condor (which combines a Bull Put Spread and Bear Call Spread) for neutral market conditions.