What does 'Ignorance' mean in Dependent Co-Arising?

A while ago I wrote a question [here](https://buddhism.stackexchange.com/questions/31913/are-all-forms-of-dukkha-related-to-a-sense-of-self) about the relation between dukkha and the sense of self (whether from identity view, from conceit or both). There, most answers said that, indeed, that sense of self was at the root of all forms of dukkha. Now I want to ask some things related to that: I know that that sense of self is part of what we call ignorance (avijja) in buddhism. And at the same time I know that the first link of the Dependent Co-Arising (or Dependent Origination, DO) is Ignorance. Is ignorance only referred to the illusion of the sense of self? Is ignorance in the DO just referring to that sense of self? Are the rest of the distortions ([vipallasa](https://www.accesstoinsight.org/tipitaka/an/an04/an04.049.olen.html)) of the mind (seeing the impermanent as permanent, the unsatisfactory as satisfactory, and the unlovely as lovely) included in the definition of ignorance? If the answer to the last question is "yes", then can we say that not all forms of dukkha arise because of a sense of self, but rather from ignorance in general, i.e. from the distortions of the mind? Thanks in advance for your time and patience.