Hello NF91 and welcome to the Astral Pulse!

I found a focus on "Mind Awake/Body Asleep" to be a fantastic focus target. When I was new to Astral projection I used that "mantra" often. I love experimenting, so at first, whether it was a book or a Astral related video I listened to, I learned to use the colors blue and orange for my mind awake/body asleep focus. When I thought the words mind awake, I would focus on the color orange filling my head. When I thought the word blue, I would have the color blue rushing down through my body.
Soon I found that that color focus with the mantra was leading to energy sensations racing through my body, so I dropped the colors and instead used a focus on my brain when I focused on mind awake and of my brain excreting DMT throughout my body when I used the thought body asleep. I usually used this until I was deep in a good solid trance state, then I began focusing on whatever my intent was for that session. Soon I found myself experiencing what I had chosen first hand.
Your method of using green for mind awake and red for body asleep is great because it has subliminal suggestions wrapped into it. I used it this morning when I first woke up and soon found myself in a "Otherworld" very quickly. After I was in a good trance state I started to try to focus on different things. First I used a "trampoline" effect. Then I moved onto simply focusing on different balls, like a tennis ball, basketball, soccer ball, etc. I did this to check how far I was into thought = action. Next I moved onto a focus on oaring and soon I found myself arriving at a Island that had a enormous Pyramid made of sand.
Because thought = action there, I no longer had to oar to get there. I just found myself there and soon I was exploring this new environment.
Thank You for this post. This brought me back to when I was new to this practice in general. I mention mind awake/body asleep quite a bit in my posts throughout this Forum and now people know why. It is indeed a very strong focus mechanism and your addition of the colors red and green just made it even better.

So to answer your question of what you should do when you find yourself deep in that state, yes, you could have just passively observed to see what you could have seen or you could have thought of your "Happy Place" or any other thing or place you intended to be and soon you would have found yourself there. When I was new to this practice I would get deep into this state and use the intent to see a simple sign on a grassy area that said "Training Grounds". I used it often and found that it led to many "Astral School" scenarios where I was taught how to navigate and control myself and my actions in the "Otherworlds". This was extremely helpful. The knowledge I gained from those scenarios was priceless for me. What I was taught there earlier on in my adventures is responsible for most of my knowledge and understanding that I have on this topic today . I was eager to learn and whoever it was that was responsible for helping me, was eager to teach me and still is today. Although today the "school classroom" aspect of it has disappeared and now I find my answers through tests, quests and adventures.