Careful not to put on a gauge that’s too different from what is already on - the truss rod will be set for a particular string tension. Go too light and they’ll start buzzing on the frets, too heavy and the action will be too high.
Yeah, but that can all be adjusted. I recently changed strings on one of my Dad's guitars that was really tough to play because of heavy strings and a high action. A set of 10s and a half turn of an allen key and it's much nicer.
Careful not to put on a gauge that’s too different from what is already on - the truss rod will be set for a particular string tension. Go too light and they’ll start buzzing on the frets, too heavy and the action will be too high.