After starting the Discovery Tour from the main menu of Assassin's Creed: Origins, simply walk into the first tour on your screen, called Alexandria: Planning of the City (6 Minutes). After you complete it, you'll earn the First Visit achievement and "unlock" the menu system.
Then, hitting the start button brings up a menu which allows you to select from (top to bottom): Egypt (20 Tours), Pyramids (16 Tours), Alexandria (14 Tours), Daily Life (20 Tours), and Romans (5 Tours).
We want Daily Life. Select it and the following list appears:
Osiris, The First Mummy (4 minutes)
Mummies of Ancient Egypt (9 minutes)
The Importance of Mummies (6 minutes)
Amulets & Rituals (4 minutes)
Temples & Rituals of Ancient Egypt (8 minutes)
Temples And Priests (8 minutes)
Building Ancient Egypt (5 minutes)
Workers & Transport (5 minutes)
Agriculture & Seasons (6 minutes)
Ancient Egyptian Cultivation (6 minutes)
Domesticated Animals of Ancient Egypt (3 minutes)
Ancient Egyptian Medicine (2 minutes)
Leather & Linen in Ancient Egypt (4 minutes)
Ancient Egyptian Fashions (6 minutes)
Artisans of Ancient Egypt (9 minutes)
Evolution of Pottery in Ancient Egypt (3 minutes)
The Egyptian Household (4 minutes)
Beer & Bread (6 minutes)
Wine in Ancient Egypt (3 minutes)
Oil in Ancient Egypt (3 minutes)
Complete all 20 tours and the Archeologist achievement is yours.
Tips: Switch Characters between these tours at last five times and you'll also unlock the Polymorph achievement. When selecting from the list above, use the Fast Travel
option to get there quicker. While on tour, you may call and use your horse
to speed up travel times between view stations. If you listen to every single stop, it will take just less than three hours to complete this one (as well as the entire DLC).
I hope this was useful and that you enjoyed your visit to Egypt.