If you are coming from the east (Broughty Ferry, Carnoustie, etc), follow the A972 (Kingsway) till you get to the large traffic-light controlled junction (which used to be a double roundabout) where the road to Forfar and Aberdeen meets the Kingsway. Turn right onto the A90 towards Forfar/Aberdeen; go through the traffic lights at the foot of the hill and go on till you get to the roundabout; turn right into Fintry. This is the pale blue and then the green line on the first map below.
If you are coming from the south over the Tay Bridge follow signs for Aberdeen. You will approach the large traffic-light controlled junction on the Kingsway (which used to be a double roundabout) as if you were coming from the east (above). Turn right onto the A90 towards Forfar/Aberdeen; go through the traffic lights at the foot of the hill and go on till you get to the roundabout; turn right into Fintry. This is the magenta and then the pale blue and then the green line on the first map below.
If you are coming from the north (Forfar/Aberdeen), follow the A90 into Dundee. At the city limit, just past the Black Watch Monument (on the left) is a roundabout with a car dealership (also on the left). Immediately after this first roundabout is a second roundabout - turn left into Fintry.This is the dark blue line on the first map below.
Once you turn off the A90 you are on Fintry Drive. The church is on your right about half a mile along, at the junction with Fintry Road. There is a mini-roundabout at the junction, the second mini-roundabout on Fintry Drive. Parking is on the street. See red line on map below. Also below is a photo of the church, taken from just past the church as you approach it along Fintry Drive - the road you can see in the photo is Fintry Road.
If you prefer using Google maps or similar, the postcode of the church is DD4 9HE.