Hello Basse!
I'll try to help you a bit.
I've struggled a bit with my thoughts about pixelart while trying to make this paintover.
I went back to study some old JRPG and Action pixel games and had to rethink some things. Like, how pixel clusters can be used.
Let me go through what I've changed here:
1)I've decreased overall saturation
2)I've decided on a light source. Your original had two shadows from the front converging to the center.
That seemed to indicate, to me, that it was lit from both sides.
Since the light seemed to be sunlight I've chosen only one direction. (Top from right to left).3) I've made door height and window height/size that are more "usable" by your character.
A person is usually around 75% a door total height, doorknobs tend to be at elbow height. Etc.
4) I've ommited a lot of detail and this was a hard choice.
You poured a lot of work doing small details.
But I felt you were in an uncorfortable middleground. Commit to eiter go full detail or simplify.
5) I've also gave some more space to the wooden pillars in front ofthe door. They are the ones giving the volume to your second floor.
6) Your roof has a perspective error you can't see front and back at the same time, and that lack of perspective was also making the chimney a mess to read.
7) The rocks felt like noise. I removed them.
If I were to remake them I would make a tile with less noise and lines.
8 ) I've made the outlines heavier than the inside lines, sometimes even removed some of them.
I guess that's basically it.
Here's my paintover:

And here's an example from Alundra if you intend to go full detail(Take a look at the value range):

I've got to say that since you said you were a beginner to pixelart this is really good pixelwork.
You linework was great and there were some good ideas going on.
Nice job!
I would like some more time to think and study but that's what I got right now.
Hope I could help you a bit with a different perspective.