Guild Wars 2

So it has been over a year and I’ve recently returned to the game and started dungeoning again.

Is it too late to go beyond Ascalon Catacombs and get any personal experience?

I’ve notice some Exploration paths have new mechanics aswell which requires me to relearn the path.

So far group beyond Ascalon Catacombs I join are all screaming at me for joining their non-experience groups becuase I’m the only one without personal experience in a non-experience group.

Not sure what you mean by “personal experience”?

If you join non-experienced groups you shouldn’t have trouble. If you’re having trouble finding a group, make your own LFG post and mention that you don’t know the dungeon and you should be able to get a group together to learn the paths.

It’s never too late. There’s the Dungeon Mentors thread which has a few people who give some of their game time to teach a dungeon (from general to meta). You could also try forming a group yourself (side note, make sure you enter the dungeon before making an lfg post) saying anyone is welcome.
That’s all that comes to mind, except that I suggest avoiding groups with the following in there LFG posts: Legitimate AP requirement (usually high ones of 5k or so), zerk runs (they want experienced people), or with “exp” in the description. Oh, and especially avoid them if the lfg post is in the Open World tab and not the dungeon tab.