What "should" a person with limited financial resources and many chronic illnesses prep?

I live in a small apartment in a large city in a red state with a horrible electric grid. I'm a single female in my 50s with quite a few chronic illnesses. I financially just can't get tons of stuff (and have no place to put it anyway) but could anyone help me figure out some must haves?

I can only get so much extra prescription medication due to insurance. One of my medications is an infusion for an immunodeficiency. They only send that right before my infusion date. I have 2 dogs that I'm trying to make sure I have some extra food and meds for.

It's stressful reading about getting water filters, lots of extra food, solar generators, etc. when you just can't afford it and don't have any family, close people you can go to in case shit hits the fan even more than it already has.

I'm sure there are others in the group in a similar predicament or at least know people who are.