Let's choose another word. Integration means processing. These experiences, both the shadow side and psychedelic journeys bring to us a lot of information. DMT in particular can give you so much information all at once. It can feel like it's just a blur. It can take time to 'process' all that information.
For me, with DMT, there are no reference points. No signs and it always seemed like the information was given to me with a language I am not familiar with. No landmarks. But somehow a message does come across.
Let me give you a personal example of how integration has worked for me in one instance. During a DMT journey I came back to this reality and had this phrase in my mind. Blaring almost and somehow I had no idea why I was thinking it. It seemed to be uploaded or implanted into my consciouness, for lack of a better way to describe it. It said "Expand your language!". It seemed important to me, yet I could not tell why it was important. I will tell you I think about this every single day. So what does this message 'Expand your langauge' mean. I have been processing/integrating this for years now.
I have figured out pieces of what it means to me personally. I tried learning another language. I tried expanding my vocabulary. I tried many things. Ultimately what I have come up with is to speak to myself and the world in another way. Approaching life in what to me is another language. This is where I am at with just this one message, and I have received quite a few over the years. As I mentioned, I am still integration/processing this. There really is no clear cut answer to this question of what 'expand your language' means. DMT creates far more questions than answers.
I guess at the end of the day that is the point. The mind wants to find solutions to questions and cannot. It loops out trying to figure out what it all means. Watching all this occur in me gave me some valuable information. That one phrase I received changed the way I was thinking. The mind enjoys puzzles. I love watching it try and figure it out. It's actually quite amazing! Question, Question, Question....... and then suddenly I am on the outside looking in in awe at what it does. Now I am in awe of watching all this occur. It just goes on and on. Infinite!
That is what I love about DMT. It knows just what to say. It knows just how to present something for your mind to keep busy with a puzzle that has no solution. I think this integration thing is highly personal. I could go on for hours with many more examples of this. The endless questions that have endless answers. It is quite beautiful! Watching the shadow side can be beautiful as well. My greatest teachers come from this place and I give them gratitude!
Good luck with your integration! Seems to me you are already doing it.
"In the universe there is an immeasurable, indescribable force which shamans call intent, and absolutely everything that exists in the entire cosmos is attached to intent by a connecting link." ~Carlos Castaneda