Recurring flats on new bike
I see three possibilities:


Your tire pressure is too low and you are getting pinch flats. As a reference point, with 25mm wide tires and your 74kg weight I’d use at least 6bars (600 kPa) of pressure, better 6.5 or 7. Refill every week or so. Usually with pinch flats you’ll have two holes in opposing sides of the tube, like a snake bite (hence why they are also called snake bites).
Spoke ends or burrs are poking into the tube. Check that the rim tape is seated properly and nothing is sticking out of the rim. Also check that  nothing is sticking out of the tire. Sometimes the piece of glass which caused the previous flat is still sticking in the tire.
Bad luck or lots of sharp debris on the road. You could use more puncture proof tires, use tire sealant or go all the way and go tubeless.