2 years Post-Breast Cancer surgery and trying to claim ESa.

Hi ,I claimed ESa when I was having surgery and radiotehrapy but ,stopped claiming when I received a large inheritance .I am now in a financial situation where I need help .I can't claim UC as I have an "asset" that means I am considered to be over the £16000 threshhold but,I hve been advised to claim contribution based ESA .I am looking at the form and ,feel overwhelmed by what they are asking .Alot of my reasons for not being able to work are based around "fatigue " .I am on Anastrazole ,constantly feel tired ,always aching and hurting and have brain fog .

Any advice ? Do I have to fill in the whole form or can I try to get away with just getting th ecancer part signed and fille in ? 

Thank you