Really struggling with executive dysfunction

I was diagnosed with autism a month ago but I’ve been struggling really badly with executive dysfunction even taking my meds or brushing my teeth feels like walking up a mountain for me mentally. I’ve tried apps where I put my routine but that ends up overwhelming me, I don’t know what to do I’m also struggling with eating since I have sensory issues and at the moment everything feels like too much. I don’t know what to do, it’s making me really stressed.