I have been an avid watcher of Crooked Staff Terrain on YouTube and finally decided to give his method of making terrain a go.
Here is the link to his blog post - https://www.crookedstaff.co.uk/2020/11/print-paste-terrain-sheds-barns.html
basically you buy the PDF file, print it off, cut it out, stick the cut outs to your choice of building material (I used cardboard) and then assemble (I used hot glue).
I took my building to the next level by making the roof out of teddy bear fur to add extra detail. I also added in some straw and a hay stack.
These really came out nice, I will be making more for sure, especially like the idea of being able to add details on the pieces to make them more 3d.