It’s more difficult to get later on than it is in the first weeks, sure, but not impossible. You can always make your own group; it’s not -that- daunting considering that you can simply request/expect, like most pugs that ask for Curve, that everyone knows tactics. As for trying to join pugs, you can always use an AddOn to link a fake achievement…
Also, do keep an eye out on the forums: there have been Ny’alotha forum runs organised in the past (and the group doing so has a Discord channel I believe), so you may join them. Their intention is really to get people like yourself, who haven’t got Curve or raiding experience, to set foot in the raid.
EDIT:
This is an old thread of that Forum Run gang, with a Discord link (not sure if it’s still valid.)