My dad has Parkinson’s and terminal cancer.. what do I do?

I’m also caring for my mum.

A few weeks ago, we were told he has roughly 3 months left to live.

We are reform Jewish, but in my personal current mindset – I am atheist, but I do have an affinity for how Judaism handles death.

I want to make sure I do the right thing when he passes, be fully respectful, and abide by my parents’ wishes, and approach his death in line with Judaism and Jewish values.

As soon as it happens, I need a plan of action in place, or I will just end up hugging his body not being able to let go, and not wanting to move.

Do I ring the shul immediately, the shul’s undertaker, or the GP (or NHS 111) first? Do I move him from the bed onto the floor?

What’s exactly done in modern day Judaism in Britain?

Thank you