Does anyone know if the event at the LVMS, which is listed as
Nov 6/7- Las Vegas Motor Speedway (Outside Track, Limited Groups- AI, ASC)
, will include an HPDE event?

also, is HPDE fine for absolute beginners who have never really autocrossed? My only experience is rev-it-up, and i'm not sure that counts

Yes. From the registration page (https://www.nasaproracing.com/nasa_event/show/?event_id=184):
Classes: American Iron American Iron Xtreme American Stock Car HPDE1 HPDE2 HPDE3 HPDE4 Pro Truck Super 7 Transponder TTA TTB TTC TTD TTE TTF TTG TTH VVC1 VVC2 VVCX

HPDE group 1 is suitable for absolute beginners (an instructor will be provided to you).