I am on the tail end of active cancer treatment with just letrozole to take for 5 years. 

I know there are many healthy eating guides-where do I start?  And what do I do to counteract the letrozole symptoms of joint pain and weigh gain? 

should I have more protein, more calcium, take cod fish oil? 

can someone give me actual examples-chicken/egg for breakfast or high protein yoghurt? 

any tips great fully received