For a first go that's not bad at all

For suggestions I would go with the following...
Don't use copydex, the model won't last long with it. Try and use UHU or Bostik contact adhesive (takes a bit of practise getting used to the stringiness).
Try and use balsa wood rather than waxing spatulas/coffee stirrers. The grain is more suited to wargaming terrain, it's easier to cut and you can get a whole lot of different sizes/thicknesses before you have to think about sizing them.
Don't be afraid to reduce the size of the details (like the window frames), it'll prove dividends later on

Last one. Keep trying, it's the only way you can improve yourself

cheers
James