I just saw this now, but I'm so sorry. It sounds like you're doing a great job of keeping it all together considering everything. I will keep you and your family in my thoughts.
I'm so sorry for your loss. I have some advice that might seem insensitive but I promise it's coming from a good place. My mom took care of my grandmother for years before she passed and she was very dependent on her in a lot of ways. When she died, which my mom also missed and felt awful about, my mom felt sad but also relieved in a way because of how much of her life had been consumed by her health, and those thoughts were really hard for her. It wasn't until after the funeral that she even started to feel her grief, because she was still "on" with all the arrangements that had to be made. So don't feel ashamed or uncomfortable for anything ur feeling. It's totally natural and u deserve to feel ur feelings when u do, not when anyone says you do
I'm so sorry for your loss. You're a great daughter. I hope everything goes smoothly cleaning out his house and with the funeral. I'll be thinking of you.