Please don't be discouraged by the comments of customcreator. I believe he was trying to help you with his criticisms but may have come across a bit obtuse. We have all been guilty of this at one time or another. No one here is trying to discourage you from building dioramas, me included as we rely on young builders like you to carry the "diorama torch" when all of us older guys are gone. One thing that many of us don't do after critsizing is giving alternative ways of doing something. I'll try to do some of that below.
Try to "Let it roll" as they say 'cause if your temper gets out of line, as a 13 year old, your blood pressure will go crazy and you won't be building anything for much longer. LOL!
You have some good things going on in this diorama. It looks as if your ability of using your minds eye to get the right size for building in 1/25 scale. The door sizes, walls and windows, for instance, look to be on the mark. The fact that you may have taken the time to trim the curved ends from the popsicle sticks and butt the ends together for supports says you have the right idea. Using less glue and painting the supports before gluing them to the insides of the wall will be more realistic. It looks like you are using a glue gun with those glue sticks. Those are very hard to work with as the glue glops and dries too fast. White glue or wood glue is better for paper products. It is not expensive either as for a 13 year old I am sure you are on a limited budget (I know I sure was). Your models, tools, furniture and machinery in this dio look very cleanly built (no glue globs) and may benefit with a powder of chalks or pastels to tone them down a bit to make them look more "used". If they are diecast, a blackwash will help the detailing stand out.
You've obviously got skillz for making the right size signs and for making workable hinges on your swinging door on the fence. Using India Ink diluted with water will help in "aging" your fence and making it look weathered as anything exposed to the weather would do.
Dukefan, there is a ton of experience on this board and other diorama boards on the net. If you have a question on how to build or make something from scratch, please ask as there are several people on this board who will suggest ways to make them and give ideas.
I also suggest you visit the diorama forum at this link as the best diorama guys in the country hang out here:
One thing that I always tell myself when building a diorama is to " Build each piece of a diorama as if it was its OWN diorama".
Keep up the good work Dukefan!