You are looking for a unicorn.
None of the skills you want will be tough effectively in a few months. It will take years to develop them and daily practice to keep them honed. Unless you plan to be a member of an elite military or police or rescue responder force, you are wasting your time. If not, those organisations will teach you all you need to know.
Check no nonsense self defense as it contains many good resources if you want to learn self defence and will dispel of a lot of the nonsense idiocy you might have heard.
Keeping fit, first aid, and survival are all off topic here. All three are wastevast subjects where many charlatans will take your money for fake, incomplete, and dangerous courses. All of them take years of learning and practice to become efficient.