Really sorry to hear about your dad. Lost my dad in mid-2019 and my mum went six months after.
It does take a lot of time to get over such a loss. I’ve read it takes two years, but it all depends on the individual.
I’ve realised no one has a happy ending as such. Old people get sick, have a rubbish final few years and then pass away. All we can do is remember the better times before, so don’t dwell on the Covid restrictions. Your dad knew the score.
It helps to talk to whoever about it. I have an older brother and was quite surprised how upset he still is about our mum dying a year ago. It’s good to talk.
As this is an alcohol forum, I should add that I’d been eight months sober when my dad died and luckily didn’t feel like a drink. Do what your dad would want and steer clear of alcohol. Take it easy and condolences again.