It shows promise as a new beginning.
The choice of those slightly detuned choirs gives an eerie, dissonant feel which contrasts the generally peaceful and laid-back ambiance. Could it be the "fallen" side of the sanctuary? They otherwise give a sacred, almost ancient undertone to the composition. I'm not sure if this contrast was sought on purpose or not, it's something I'd be more careful for your next Ambient piece sound design-wise.
It also has a nice structure. I think it could easily fit in a video game, since it has that potential of being looped virtually endlessly. The last thing I would point out is that Ambient music rarely employs edgy sounds, usually derived from EDM nowadays, and instead generally opts for mellower tones. It's not a rule but usually such pieces tend to emphasize the atmosphere and mood of the soundscape by exploiting each element's timbral qualities.
It's why Ambient tends to sound like a joke when it isn't, it actually implies a profound knowledge of each sound you have. Ambient music lets you dig further into the sound by exploiting the generally tempo-less (or otherwise really slow) nature of the style itself. If there is a melodic component, it's usually a slow evolution. I'd suggest you to keep exploring more sounds, more interesting ambiances and train on how to bring subtlety in your future works. It will be a rewarding experience in the end. ;)