It's probably not as confusing as you think... Or I would not be getting any votes I'm guessing...
Even if it doesn't help with this specific question, it could help someone else along the way... That's how I myself learn, so if it doesn't offend anyone who's "non-anonymous", I'll keep trying to help...
What I'm trying to show is:
read an entire directory of filenames into an array...
skip files you know you don't want...
Then read them back one at a time and do your thing (whatever that is)...
That was valuable to me at one time...