Consciousness has to start somewhere, and it starts at the foundations of the world.
The fact that foundational mathematical categories, relationships and numbers exist, does NOT imply knowledge of their existence: consciousness is that necessary, separate, knowledge aspect of the world. It is necessary that the underlying mathematical system knows which particular, on-the-spot categories, relationships and numbers it is dealing with, out of all the theoretically possible categories, relationships and numbers that could theoretically potentially exist.
Consciousness is the first-principles knowledge aspect of the world, an aspect which is different to the first-principles mathematical aspects of the world. The first-principles knowledge aspect of the world manifests itself as thoughts, feelings, and emotions.
But presumably only higher-level consciousnesses have feelings and emotions, because feelings and emotions seem to summarise quite a lot of underlying goings-on. Higher-level knowledge and consciousness IS “higher-level” because it is necessarily an executive-level analysis and collation of myriads of separate items of foundational-level knowledge, e.g. coming from the senses. The myriads of separate items of foundational-level knowledge DON’T “self-organise”: definite acts of analysis and collation have had to occur, in order to acquire higher-level knowledge/ consciousness.