Well, I only got to know that missing mass is an issue just a couple of months ago

(I guess via this forum). Comparing my little knowledge about the church teachings with that of the many Catholics I know, I can fairly conclude that a lot of Catholics are blank when it comes to what the church teaches.
Apart from the doctrine one learned (during childhood) before taking or
receiving (not quite sure of the correct term

) first holy communion, most Catholics are later only exposed to homilies during mass and one can’t or doesn’t get to learn the church teachings during homilies.
NB: I first heard about NFL about a year ago