Beginning meditators often worry if they are "doing it right." But don't worry, there is no "right" way to breathe during meditation. Just breathe naturally and allow your breath to be as it is.
In meditation, we cultivate an awareness of the breath. We notice if the breath is short, whether it is long, labored, or easy.
The most difficult aspect is practicing acceptance - or nonjudgment. Maybe you're tired - accept it with open arms. Maybe you're upset about something, distracted, or ruminating. Simply be aware of these things, allow them to occur, and with kindness and gentleness toward yourself - calmly refocus on your breath.
If you would like to work on your concentration and focus, begin to silently count your breaths, adding after each full breath cycle, until you reach 10, then reset the cycle. If you lose count or your mind starts to wander, don't worry! Be gentle with yourself and begin again at one.
That's it! You've been breathing your entire life. If you've done any of the above - congratulations! You are well on your way to beginning your meditation practice!