Oh you poor thing.
I can see why you're suffering - that looks extremely sore.
The brackets will feel huge for a while, but that's normal, they look perfect.
You will see changes really, really quickly. The more 'aligned' my crooked teeth got, the less discomfort I have. So the more mis-aligned your teeth are to begin with, the more sore you'll find it.
I still have mine on but 18 months later I forget they're there until I've eaten and I have to pick everything out of them
Right now you've got brand new brackets and wires poking and rubbing and you are probably throbbing with pain and they must feel so tender.
Keep taking painkillers (according to dosage guidelines) and eat/drink what you're able to. Even it it's ice cream to make you feel better!
Use a water floss machine like Waterpik and rinse with mouthwash when they're too tender to brush.
I know it's miserable, and no one quite warns you just how bad it can be, but it does get better. I know the desperate feeling of wanting to RIP THEM OFF NOW but it does improve.
It feels like forever but the time absolutely flies by.