I would just put him outside on the meadow every 1-2 hours.
If he is peeing inside, just say "no" and put him outside, for sure praise him immediately after he has done his business outside!
But I woulnd't start with the pads.
Best is to give him a treat after he has done it outside and say the word |potty|.
Mine used to know when I said "potty" that we are going outside.
Hope it works out