There a number of things you could consider. If the cupboard isn't working (sounds like you would like a proper wardrobe) can you remove it? This would give you more flexibility to rework the layout and put a wardrobe in a better location. Sometimes when you have lived with a particular layout it is harder to see what the potential is. If you are going to do a full makeover, remove everything from the room, decide what pieces of furniture you are keeping and what else you need to buy. Twelve is a transition age so your son should be involved as much as possible to develop storage solutions, layout, paint etc. for his future needs. It is also an opportunity to let go of items he has outgrown or has no need of. It looks like he could do with some more shelving up high to display collectables and free up room around his bed. I am sure you will have fun working it out between you. Visit some furniture showrooms and search houzz pictures to get some ideas.

What about the pics I uploaded. I didn't see any confirmation that they had arrived?

Also you need what you use all the time at eye level you seem to have every day items on the bottom shelf. The middle two would be so much easier. I also feel it could be time for a big clean out. Empty everything from all shelves, I know its very time consuming but the only way to do it. Allow a whole day. Go through everything individually, put like items together. Keep baking items together, sauces, gravies etc. together, cereals together, snacks together. Work out if you need to buy some baskets or plastic containers for loose items that should go together. Once you start you will be on a roll. When finished you will wonder why you didn't do this before. Dont forget the timber steps, I think you can buy plastic ones also. I have also seen expanding racks that do the same. But I have found them to be a bit over priced. Don't forget to treat yourself after the good job you have done. Good luck

Hi again watchedpoppy, most overhead cabinets are actually 300mm deep for ergonomic reasons; where they can sit 450mm above your bench. This allows a clear line of sight over the benchtop (and without hitting your head). In recent times manufacturers are making Undermount Range Hoods deeper and they need 450mm deep cabinets, but this is perfectly fine for a range hood cabinet because these deeper units need to be set around 700mm above your benchtop, and have a high cubic metre per minute m3/m extraction rate, where again ergonomically you still see your bench clearly and also do not hit your head on the cabinet. With this arrangement though we recommend that you do not step down the overhead cabinets next to the hood, but keep these also around 700mm above the benchtop like the photos here of a kitchen with a Falmec Undermount Hood that we made recently. Free standing Canopy hoods are set up with this same principal, have higher extraction rates and these usually protrude out even further at around 500mm deep. Hope this helps allay any concern. Regards; Malcolm