Well I had a fool moment too, I couldn't figure out what in the world a paper, hardware, software mobile wallet etc all were, so I just kept my bitcoin on an exchange for nearly a year before bothering to try and figure it all out. Fortunately for me nothing terrible happened to my exchange in the mean time before I got a Trezor but plenty of others in the same time period were not so lucky... I guess for all of us when we are first introduced to something we are not going to be experts in it.