80% of golfers have never been fit according to the NGF. Even beginners need to be fit in a static fashion, taking measurements and using an educated guess by a knowledgeable fitter. To truly fit someone we need a somewhat repeating swing motion. Best done on grass outdoors where ball flight can be seen and all clubs hit from turf that are meant for that use.
For heavens sake, even get your wedges and putter fit. It will make a world of difference.