Boot oil works to soften the leather and walking around them in the house is great👍
I have the same ones just walk around your house in them in like 10min increments that way you can't get blisters
I walked up and down the stairs a lot or just wear them around the house lol
Run a hairdryer on low over them the heat will help them mound to your foot and leg better
Ride a bicycle with them or walk the stairs a couple of times. And simply use them a lot! Goodluck!
At night put a Large cup with a hot/warm towel inside the boots along with wearing as much as possible. Cup will cause stress on leather and heat will allow it to stretch.
Wear them while you're just wandering around about the house! That's how I did mine! And add thicker socks as you can to help break them in then!
I just walked in them loads around the place and put saddle oil on them :)