For Astaksharajapam, should we follow this order of – doing Acamanam, Sankalpam, and Japam? What is the order for chanting Dvayam and Carama slokam for women?

One must do Acamanam before chanting Ashtakshara japam. There is a specific dhyana slokam for chanting Astaksharam, Dwayam, and Carama slokam. The concerned Acarya would have taught it. After reciting the dhyana slokam women can do japam and there is no sankalpam as such for these.