I know I didn't comment initially on it, but I just wanted to say I'm really, really sorry about the passing of your father. I can relate as I lost my mom in 2020 due to gastric (stomach) cancer. It was a ten-month battle for her and I kept taking care of her and the house the entire time, prolonging her life as much as I could.
I've had a lot of cries since then and I'm worried that my dad may pass soon as well, even though he's in great health for his age (70's), but the reality is that I really have to focus on the good and keep moving on. The grief will be with me for the rest of my life, but I won't dwell on it, because there's so many more good things in store for me and I know my mom would just want me to live my life and be happy.
I think that's special that you're taking the chair that he used to sit in. Truly.