Just diagnosed and very scared

I have just been diagnosed with kidney cancer which has spread to my liver and chest. I’m 45 and at a loss as to what to do or where to go for support. Any advice would be gratefully appreciated. I do not have family I can call on. I have 2 sons aged 25 and 19. Telling them my diagnosis broke my heart. I don’t want to lean too much on them for emotional support. Thanks for any help and advice you can provide for me x