The way I have it is: the Observable Universe looks as follows.
I think that's about right, with a very strong emphasis on the "looks as" part.
Note that the observable universe, as you are using the term, is nearly synonymous with the observed universe (with some exceptions made for better telescopes, and the cool new gravity-wave observations that are starting to be made).
So of course what we see in the far distance is also from far back in time.
This leaves no room for an infinite or curled back on itself Universe,
There is no room in the observable Universe for an infinite or curled-back-on-itself Universe, no. Or at least, there is no definitive evidence in the observed-so-far universe for these.
so it must be a wrong picture.
Cosmological models that posit the existence of an infinite or curled-back-on-itself universe cannot be confirmed or disproven by looking at the observable universe, because by definition the observable universe is finite and those models are positing structure that, without faster-than-light measurements, cannot be observed to be proven or disproven.
Just because we cannot and never can see it doesn't mean it isn't there, any more than it means it's not there. Unless someone can contrive a way to definitively measure what's beyond our limits of observation, we're pretty much doomed to never knowing the answer to this.