Hi Ali78 - sorry to hear your news. I was diagnosed at a similar age (44j.
Thinking of you and wishing you well in your treatment. I felt much better once there was a plan to treat the cancer. It was a relief to have the cancer surgically removed.
I did have to go through chemotherapy as well (though not everyone does). I ended up taking leave from work to go through chemo and I am glad I did.
I am back at work now though and am on hormone blocking medication long term.
One of the things that helped me during this period was changing my diet to be healthier (adding more vegetables and protein in particular) and keeping as active as possible. During chemo I only went walking but since that has finished I am also doing strength training which I feel has improved my wellbeing. Also, having support from family and friends helped me to feel better during this difficult period.
All the best.