Nothing is really customary, depends on who you are visiting what information they require. However if i were you i would stick to some less "new" providers until you get your feet under you. This is a great site to find well reviewed girls who will treat you right
my $.02

Some of the ladies ask for additional information aside from the RS data that you may have already supplied.  Typically the cell number is SOP when screening.  As far as age, a number of gals may have this as a point on their website (some don't want guys under a certain age).  I have seen some of the ladies want to know a profession, and you would need to ask her why she is looking for that information.

Now as a newbie, you said you contacted a "new provider"...I trust that you did look at her reviews to make sure that she will fulfill your needs.  Remember, TER is your friend and you should be doing the same, if not more stringent, screening of her as well.  Don't assume that just because she is on RS2K that all is well. Make sure to do your own homework.

I met a lady about a week ago who did virtually no screening---told her I was RS2k, and I had found her name on TER.  She immediately - without calling RS2k -  said 'ok' lets meet! Turned out ok---but I drove around the incall several times to see if there were were any Crown Victorias parked nearby before I went in.  Have been wondering if I should give feedback to her that her screening seems light?

Your cell phone (you're using a burner, right?) is part of your RS2k info, and technically RS2k providers SHOULD check your ID you age and height aren't something that she wouldn't find out anyway lol The only thing you're left with is profession, and perhaps they just want to know that you'll have something to talk about.

I know some have knocked you for seeing a new provider but is she actually a new provider or just new to you? If you're new yourself, you shouldn't be risking yourself by seeing someone without an established history.