How the hell do you get motivated, or strong-arm yourself into doing what you need to do regardless of how you feel?

I always feel tired and overwhelmed these days, and despite the fact that I want better for myself, it's easy to put off doing what I need to do or do something I'm trying to minimize or phase out, only to tell myself "I'll try to do better tomorrow," but it's EVERY DAY. I'm so sick of this, but I give in way too easily. Somewhere along the line in my youth, I became a quitter and started giving up extremely easily, and it's become horrible for me. It was around the time I lost all of my self confidence. Or was robbed of it, I don't know. I was constantly told I was not capable and couldn't do things without assistance, despite it not being true, but it impacted me and now I don't know how to retrain my brain to let go of that BS and be the go-getter I used to be. I just feel like I'm letting life happen and I'm too tired, unmotivated, and unexcited to do anything about it. Everything seems so far out of reach to me. I'm sure most, if not all of it, is in my head, but this has to stop.

Therapy is not an option for me. As a matter of fact, being put in therapy in my early teens is a big part of what caused this mess. I simply don't trust anyone enough to open up anyway, and I couldn't afford it if I wanted to. I need physical therapy more than I need mental therapy, and I'm worried about how that's going to financially drain me.

I feel so overwhelmed. I have a house FULL of shit people brought over when I moved in (stuff they no longer wanted in their house), and would not stop after I told them I didn't have the room. I should've just refused it and made them take it back with them, but I didn't, and now every closet in my house is jam-packed full of clothes and boxes, my garage and basement are full of boxes, and I feel like I'm being buried alive by the shit. I really need to clean out my kitchen cabinets and get rid of all of the kitchen ware I never use, and clear out expired cans and boxes of stuff. I just feel too exhausted and overwhelmed to do it. Where do I even start? My fridge needs cleaned out. Yes, I know, these are better problems than having nothing, but like I said, it's extremely overwhelming. I start, feel like there's just too much to do, get overwhelmed, shut down, and stop. I WANT OUT OF THIS CYCLE SO BADLY. I FEEL SO STUCK. Is there anything I can do for myself about this? I really want to kick myself in the ass and get what I want done.