(Great You tube channel to explore, Qld physio)
https://youtu.be/5NDC0_vzErk?si=zCXHIwt6SfSAYe1k
PS very normal to be sore for ages, it takes a long time to heal, inside.
If your lucky enought to have a scar therpist near you - they are amazing at helping it heal and reduce adhesions, which is what pulls it tight. ( so several ladies at our breast cancer group tell me)
https://restorescartherapy.com/location/australia
Even if your hospital doesn't have a bc nurse, you are allowed to contact one nearest you .
https://www.mcgrathfoundation.com.au/get-support/find-a-nurse/
PS mine was really sore for 3 mths, i was a wuz, but all the anxiety made it last much longer. I should have got councelling early on, its a big thing to go through. Highly suggest councelling and dialy meditation and rehab stretches. BCNA have a series of videos too to get you started on post surgery stretches to gently help the ribs and shoulders after being hunched for a few weeks. https://www.bcna.org.au/resources/articles/strengthen-your-recovery-pilates-program/