Really cool thematic execution here. Contrasting the piano in the intro with some soft synths, subtle in the mix and just peeking through, is really clever. Adds some really nice texture. Those pads gently coming in and accompanying the main instrumentation is also really nice. The guitar work in this is fantastic - beautifully soft and contemplative. Almost whisper-like in the beginning before finding its voice and standing out.
The middle section has some nice use of noise as a texture to really create an expansive bed to work off of here. Keeping the guitar more on the clean side is a good shout, makes it so you can weave so many more subtleties into the playing and complement the lines with harmony and emphasis on certain notes. Reverting back to the piano and soft synths after this section was a great way to call back to the first section of the track and provide a kind of mental reset.
All in all, this is great. The structure of the song is fantastic - the first had me right in place of what you're describing, looking out of a window and seeing the world beyond the pane. The second is akin to the decision to get up and open the door. Venture out into the world and embrace that freedom, while the last section represents those steps outside growing more and more distant as you wander off into the world. Good job, this was a delight to listen to.