Funny how the crits stop coming when they clearly don’t bother you…
In any case, it’s great to hear that you are having fun. I remember when I made my first stuff with A5. It was awesome. If I would have shown it, I would have been flamed, but I was genuinely having fun.
Now on the other hand, if you are looking to sell 3d stuff then this shouldn’t be your first product. This should be a starter that you can use to build skills for future projects. Truth be told, there is a lot of free content out there that is superior.
Once your skills have advanced, you can work on a new castle. Next time gather source material, pictures of castles and floor plans. This will give you a better ‘feel’ for proportion and style.
Keep having fun!