You may need short reach levers if you have particularly small hands. I've never needed them, but I've heard of people with small hands who find them more comfortable. The main thing, with regular levers or short reach, is to practice good form. That means keeping your elbows relaxed and supporting your body with your core (as opposed to hunching on the bars). Start with going to the local shop to get an experienced person to look at your form and your levers, and then go from there.
Enjoy your bike!
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