Hi @beatit2027, welcome to the forum - I hope you find it a welcoming and supportive place. You can find lots of info on how to get started on the forum here Getting started on our forum - Welcome and how to use the forum / How to get started - Breast Cancer Now forum
I would also recommend using the search function in the top right hand corner to find people who have had a similar diagnosis and treatment. For example, here are some recent threads from people who have had an HER 2 positive breast cancer diagnosis:
https://forum.breastcancernow.org/t/her2-and-need-some-buddies