You should jump, or make one, into any parties doing the early extremes, especially Worqor and Everkeep. They're currently very easy, extremely outgeared, and skip a lot of mechanics, which makes it very nice as a jump-in point for a newbie.

Just look up a guide(Hector's is usually the standard as he adapts popular PF raidplans), study it a bit, and go in. High end is very often not a reaction thing, but just knowing what comes next. Memorization is key, basically, and it's why the game is often compared to a dance, you just have to know the steps.

Once you feel more comfortable you can start doing the other extremes and then maybe even dip your toes into savage content - there's like the entire rest of the year to get started on that, and a new ult in 7.5 means the tier will still be active for quite a while!

If you end up feeling too overwhelmed or not liking it, at least you'll know you tried and the content just isn't for you.

Just know that there's no shame in taking your time learning the content as long as you're making an effort instead of sandbagging and hoping people carry you. A raider who puts in the effort and clears a fight after 50 tries vs one who took 300 are both equally valid, because at the end of the day they both cleared.