The calendula cream you can get at chemist. Look up Moo Goo online to find stockists. There is a Cetaphil product and Dermaveen also at supermarkets too. There are a lot of good emollients but avoid Sorbolene as it’s smelly and sticky. If you are small chested you may be offered Mepitel film to protect your skin and I believe creaming is unnecessary.
I am on Letrozole and have been for 3 and half years. It’s doable but there are side effects you need to work around. Walking daily for an hour helps with joint stiffness which lasted a few months until my body adapted. I ‘ve had a few tendon/ muscle issues needing physio and time.
Did you see the responses yet to your post called Lobular cancer. Also look on RHS there is a group specifically for those of us with Lobular breast cancer that may be useful.
Hope the above helps.