Hi Christian.
Sorry to hear about your dad. I was 55 when DX 3 years ago and don't consider myself old either.
You can get the toolkit from Prostate Cancer UK web site which gives you a good source of reading. Although I bet you wish you sis t need to read.
The PCUK nurses are also superb if you need someone to talk to. I know that they have helped me immensely over the past 3 years both emotionally and for their knowledge.
No doubts others will be on soon to give advice etc.
Keep strong and positive.
Stay away from web sites that try to sell you stuff and stick to PCUK.
Sandy