Integration is a process that happens when the original "self" is actually ready to throw off the coping mechanism that was employed in childhood as a necessary tool for survival and protecting the "self" from overwhelming experiences.

It is a scary process and more so for the alters because they think they are "going away". They will resist it and You will feel as though you're being set back at times. There will be anxiety and depression for certain alters at certain times because they don't really understand what's happening. You'll need to remind them that they played an important part for you and that they have memories and experiences that you want to have for yourself too now. Good and bad.

being aware of all traumatic /memories from the gaps throughout my life -- Integration cannot happen if this doesn't happen. You/the self, has to see, hear, experience and finally accept all those things as the self comes forward. Integration happens when the mind of the "dissociated self" is strong enough to handle the truth. It also can't happen until the "self" accepts that she/he is a "survivor" and not a victim anymore and that those things cannot happen again. She/he has the power now.

As the integration progresses, various diagnoses will be adjusted. It is likely that the DID diagnosis will be removed, however, you may be left with depresssion for quite some time. The DID will probably become C-PTSD - Complex PTSD for a while. That is, flashbacks, anxiety will exist with a milder form of dissociation at least. It is likely you would experience flashbacks for many more years but you will learn, if you haven't already, how to ground yourself and manage all that. The closer you get to being fully integrated, the easier it will be.

I wish you all the best. Be good and kind to YOURSELF and your alters.