Im scared

Hi beo0p432990 , welcome to the forum, sorry to hear that your mum has been diagnosed with breast cancer. The unknown is often much scarier than the reality - you will hopefully feel less scared once your mum starts treatment and the cancer is ‘dealt with’. Don’t Google!! So much information out there is out of date or just wrong. And may not be relevant in any way to your mum’s particular situation. I wonder if it would help if you asked your mum for more information so that you know more about what she will be facing in terms of treatments. Also there’s a family section on this site which could be good to join as well. 
Breast cancer is generally very treatable these days - I am now 7 years post diagnosis. I will say that my primary concern was my children, who were 22 and 24 at the time. We hate to worry our children. If your mum really doesn’t want to discuss it with you, maybe there’s another relative who you could talk to? 
It’s good that you have come here - lots of support and shared experiences. Sending love and a big virtual hug, HFxx