There are two ways to fit people, I have read anyhow. One is to assume that the golfer will never change his swing, and the clubs should be adjusted to his swing. The other is to use body measurements to get what he should have if it is an ideal swing. So getting adjusted to your body measuremnts at first may be a good idea, or wait until you ingrain a swing into muscle memory, as long as it's a good one , and then get custom fit. I agree with the mom and pop store that it is a waste of time starting out, unless you are far from the average american male. say your really tall or really short than getting adjusted at first would be a good idea iMo

But when your first starting out your swing likley is not repeatble enough to even get custom fit yet.