No pictures but need help!

No pictures but need help!

I am moving out of my 2BD 2BA apartment that I share with a roommate soon, and I will be moving into a tiny studio all my own in August. My problem: I am utterly messy. I cannot keep things clean and organized for anything. Right now I'm really just sort of disgusted with myself for how my room looks but I don't know how to even start cleaning. I hauled 2 bags of shit out of here last night and it still looks really bad. I know that eventually, with my mom's help, I will get everything cleaned up when I leave (my mom is like super-maid), even though it will probably take the both of us working together several hours to get everything picked up, cleaned out, and if necessary, thrown away. But, I don't want my studio to look like this after I move in. In my new lease, it says that I can be fined for having excessive trash in my apartment if the maintenance people come in to spray for bugs/fix something and see it. The way my room looks right now, if it gets like this next year, I'm going to be paying some fines. Thus, I really need some help with how to keep things organized. I have alot of stuff and I already told my mom that we HAVE to throw every unnecessary thing away before I move because I don't want to take it with me, but I still feel like I will have too much. Tell me how you stay organized, please!! If it helps at all, I can post sample pictures of what the studio will look like, from the website of the realty company. Thanks SOOO much!!!
Does anyone else encourage “weeds?”

Does anyone else encourage “weeds?”

Plant ID

Plant ID

Hydrangeas – The Sea of Upturned Faces

Hydrangeas – The Sea of Upturned Faces

my room

my room

My first home

My first home

I haven’t posted my new room!

I haven’t posted my new room!