I have no idea how to get those fine straight lines. I used a pallet knife in this one. I would love to be able to get those line like yours.
I've tried palette knife several times and it just looks aweful so for that I have no clue
But for the straight lines, I just use a flat brush, quick strokes...I guess that's only a matter of time til you master that.
I have some other suggestions for your house painting.
1.On the shadow side there should be a slight blue shade and on the sunny side a warmer color.
2. Make more distinctions between trees so one can understand that there are several instead of one really thick bush.
3. correct the perspective on the right side, they're a bit off.