So many sub-Catholic denominations under one umbrella, their own belief emphasis, variations of official teaching, costumes, etc. that it’s hard to keep up.
Also hard to keep up with the criticisms from one sub-Catholic denomination of another.
That doesn’t even begin to touch on the differences between whether you hold the communion wafer in your hand or have it placed in your mouth, whether you listen to someone speak in a language you do not understand (latin), or hear the service in english or spanish or whatever, whether you use an older version of the service or a new one, whether you have classes of attendees or none, and on and on...
But, I guess the good part is that this is all happening under one leader (who isn’t followed, but is criticized to no end), one name (but the meaning is quite diluted depending on who you speak with) and one official teaching (though the majority - seemingly - pick and choose).
Why would you feel the need to "keep up?" Unless you are Catholic, of course.
Are you Catholic?
Anyway, I am Catholic, and I don't have any problem keeping up, so you can rest easy and worry about something else. Thanks, though, for your concern.