[Semper]

Where do information-rich structures (so necessary for evolution) evolve from?

I don't know, I'm not a biologist. Just using reason, however, it would seem logical that an "information-rich structure" would have evolved from an "information-poor structure". In other words, in an infinite process of change, each iteration of a particular life form would contribute to the informational progress of the next iteration of that life form, appropriate to the developing environment.

[Frumious Bandersnatch]

Even with a catalytic agent of some type, the odds against information poor structures producing the type of information rich structures needed for life are mind-boggling.

But if I were to grant that this could be done (which I don't), there would still be a problem with trying to explain irreducible complexity.  That point when several interdependent structures cannot exist without each other.  IOW, the point when life begins.  Before that, you just have a blob of chemicals.