Greetings my friends. I would like to familiarize myself with sans fonts (I seem to have a problem with differentiation of sans), so much so that I can recognize them and name them and, hopefully, know what my designs need in a more timely fashion. Can you please tell me different ways to familiarize myself with them, besides use of course, that can better train my eye? Thank you so much for your help, as always. I am a sponge-impart your wisdom!