“Not knowing that the initial attachment doesn’t need a doer …”
The ignorance here is likely not about a “doer”, or whether a “doer” is or is not needed, but it is ignorance about anicca, dukkha, anatta.
In your example, looks like you were describing the following steps in paticca samuppada (in nidessa version):
samphassa paccayā samphassa-jā-vedanā
samphassa-jā-vedanā paccayā taṇhā
taṇhā paccayā upādāna
You may be interested in the following post:
Taṇhā Paccayā Upādāna – Critical Step in Paṭicca Samuppāda
Best,
Lang
