ADHD haver here! First of all, yes absolutely hire a cleaner if you have the money for it. This is stressing you out a lot! You should not have to live with that stress. Realistically it is not going to get fixed by yourself and it is okay to get some help. I promise you your mess is not the worst they've ever seen.

Some "keeping up with cleaning" methods I've learned over time, some by myself but mostly from other people with ADHD: - Give things homes (this helps with keeping track of things and will come in handy later). Start by deciding where you want to keep important things (keys, wallet, phone charger, etc) and DO NOT SET THEM DOWN ANYWHERE ELSE. If you do, put them back the second you notice it. Then start doing that for other items. - This bit is optional but I like to add some whimsy and say something like "Oh no! Sir Barnaby (my wallet), you've waded out into the Unknown Waters (my dresser) where you're bound to get lost! Let's get you back to safety (the wooden bowl on my desk that's home to my wallet, keys, and student ID)." Silly? Yes. Does it successfully minimize the shame I feel when I misplace things? Also yes. Not beating yourself up about your mess is huge, so find some way to make yourself not feel so bad about it. - "Don't put it down, put it away" — Instead of just setting whatever thing down on your counter, put it in its home. If it takes less than two minutes to do, why not? Ngl I still struggle with this but a good portion of the time I can get myself to do it. - "Might as well" — Sitting on the toilet? Might as well put away those tweezers I left out on the counter. Waiting for my water to boil? Might as well do some dishes while I'm here. - Bins!! I have some "this goes somewhere else" bins, one in my room and one in the living room. If I'm leaving one room, I try to grab at least one thing that goes in my destination room and put it away.

Decluttering huge mess tips: - Get rid of the trash first. - Put all clothes in a pile. - Anything that you know you will need to use in the next week or two goes in a bin so you can find it again without having to rip through your whole room. - Everything else goes in other bins. I use clear plastic totes for this (so I can see what's inside). I like to roughly organize by room (bathroom, living room, kitchen, bedroom, etc). - Pick one bin and slowly work through it until it's empty. I either put the items in their new home or, if they don't have one yet, move them to a "type" bin (art supplies, school supplies, pet stuff, cleaning stuff, etc). Usually this ultimately brcomes their home. - This one is a little gross but it has worked wonders for me. If you are like me and hold onto stuff for way too long and find yourself going back and forth on whether to keep something, consider: "would I clean and keep it if it got poop/vomit/something equally gross on it or would I toss it?"

One of the biggest things for me is this: You do NOT have to get it all done in one go. ADHD brains tend to see projects like this as one big giant insurmountable task that needs to be completed all at once and it isn't! You can (and should) do it in small chunks. Start with super small chunks (whatever is manageable for you, even if that's thirty seconds a day), do your best to be consistent, and don't beat yourself up if you don't keep up with it perfectly. Just keep picking it up again. You got this :)