Hello guys and gals.
Welcome to another easy F1 2019 Achievement.
For the drs zones, there are usually 3 on each track (Excluding places like Monaco) ,and there are a few ways you can tell if your coming up to a DRS zone.
On the mini map, you see a small green streak, on the right bottom corner you see a zone is coming up as it counts down from around 250M but the best way i found, was keep your finger hovering around the
(DRS) button, soon as you hear a beep, press it as quick as you can..
Should only take you a lap or two to get into it and complete it.
Also, you don't have to do this with a practice programme if you don't want, just learning the track will be enough.