TW: loss of pet

I put my dog down yesterday. I've had him through my 20s and losing him as I enter my 30s feels like such a hard transition that I'm not ready for. I can't get off the couch, I don't know how to take care of myself today or what that even means or looks like. I just miss my dog and I feel like I failed him. Tbh I don't have much experience with grief and am really struggling to do anything but zone out/couch rot/cry. Much less do my daily Finch chores. How do y'all do basic things after something like this?