Don’t know how to process me dads cancer diagnosis

Hi all I’m knew here just looking for some advice. So as the title says me dad got diagnosed with cancer yesterday (November 15th) and I really don’t know how to process it. He went for a liver scan on November 13th and got the results back on the 15th. The GP is almost certain that its secondary liver cancer and he’s a thorough GP. Dads waiting for more tests to find the original source, but we think and he thinks it could potentially be bowel cancer since he’s got polyps behind the bowl and is waiting for them to be removed.

Anyway I'm really really struggling to process this. Normally my emotions don’t bother me as I’m not an emotional person. Yet this one has just turned my life upside down. One minute I’m upset and worried even crying especially since I’ve learned that his side of the family cancer appears to run in. Then other times I’m fine, I feel like the normal me without a care in the world, then it hits me again about dads diagnose. My dads, dad passed away from cancer 30 years ago, I believe from liver cancer.  I know treatment has improved dramatically since then but with it spreading I’m more worried than ever now. I’m really struggling since I can’t talk to me mum or sister since they’re still trying so process it, and obviously I don’t want to think what me dads going through until he comes to terms with it. He knows we’re all there for him and the rest of our immediate family when he’s ready to talk. He doesn’t live with us anymore but I speak and see him more times than I can count. Anyway I don’t have any friends I’m kind of a loner and struggle to make or keep friends, since I suffer with autism. 

Does anyone have any advice or tips that can help me come to terms with this?

Thanks in advance