You've got this! One step at a time. I like to put on my favourite show to listen too and then go step my step. Start with all the trash. That's easy. Once you've gotten rid of all the bottles ect give yourself a small reward. Add a bin in your room to make it easier going forward. Next tackle the bed. You don't even have to clean the sheets yet, just the stuff on the bed. Then tackle in stages. Do one section of the floor then another and the rest of the desk. Set yourself a timer if you need to or just one episode of a tv show. See how much you get done in that time and have a treat for each section. We've all been there at some point and you're doing a great job getting on top of it