I would recommend test riding for people who are n00bs to cycling (like myself), to at least get an idea of what style(s) you like, what seems comfortable, etc.

All the info about frame geometries and other facets of cycles can seem very complex and overwhelming at first, to somebody with little experience. Its easy to get analysis paralysis and become discouraged. But by going to a shop and hopping on some bikes, something will eventually "click". This isn't to say a person shouldn't make an informed decision prior to settling on a bike, but ordering a bike sight unseen based on frame-type measurements a custom bike builder might want, is over most people's heads initially.

Standover height and wheelbase were about as deep as I got into the learning curve before settling on a Trek FX for commuting.