Good Morning Sir I Am 24 Years Old Boy And

Good morning sir I am 24 years old boy and I suffer from prostate cancer at the age of 21yrs and I have done robertic surgery in Rajeev Gandhi Hospital and my all prostate is remove n 14cemo n 24 radiation is given to me n till I am going for follow up and there is problem of errection of penis what should be done for it and can I have parent or not after remove of prostate