Should the guitar be strapped on tight or should it be very loose while standing?
That depends on the guitar, the strap, how tall you are, and how low you choose to hang your guitar. Some people have to keep the guitar jacked up to their stomaches or they get horrible back problems. Other people hang the guitar down by their crotches or they get horrible carpal tunnel. Most people fall somewhere in between.
Adjust it until you are comfortable- especially considering your wrist position.
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if you play with the guitar at a certain height while sitting, (like up at your chest)

then adjust the guitar to be played standing at that same height, and gradually lower the height over time,
so you can continue to play comfortably.

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Set up Questions? ...Q & A Thread

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