I'm so sorry for your loss, OP. :(
I know what it's like to lose loved ones, in particular to Covid-19, so I empathize whole-heartedly.
As for advice. All I can say is to allow yourself to feel the grief, anger, frustration, etc, and not try to suppress it. There's really no escaping the pain of loss, so the best thing to do for yourself is to let it happen, because, in time, it will pass. Not that you'll ever not miss your father, or erase the pain, only that the rawness of the loss will subside, and the healing process will begin. There's no easy answer to give you, unfortunately. I've found what has helped me during my grieving process is to reminisce on the good times you had with your father. Laughter truly does help, even if it doesn't stop the tears and sadness from welling up. Just the process of expelling those emotions is a kind of release that opens the door towards healing, though it's not a quick process, believe me.
Sending lots of positive energy, healing, and strength to you and your loved ones during this time.