It is very difficult to put a life together after the onset of ptsd, from any cause.

It probably is best to treat life like a brand new journal to write in, or a new chalkboard that has nothing on it, and never did.

List those basic things that you must have: food and water, sleep etc. Make sure you have good plans on how those things will "happen." (I have to tell you, after 21 years I still struggle with all that, but my basic plan is what keeps me going when my mind can't function.)

It's necessary to remove all extraordinary interactions, and limit over stimulation, especially when first trying to get your "act" together and stabilize with this disorder, imo.

Add in one new thing at a time, something you used to like to do, and see if you can still do it with enjoyment. (I haven't found anything that I can really enjoy from before ptsd ..but a big part of that is also my physical disability.)

Step by step...baby steps. Very slowly... very, very slowly.