This!
@Brightnessinside I feel your "advice" is coming very much with a large serving of projection of what it would be like in your own situation with your DS.
@bendmeoverbackwards I'm seeing you reaching forwards in your thinking in a way you haven't for a long time, looking to the future both for DD3 and for you and DH (and DD1 and 2) and seeking to make it the best it can be for all of you.
It won't be a linear journey, it'll be a marathon with steps back aswell as forward but you are on a different path now with regards to your determination to move DD3 out of her "paralysis" and into her version of a full adult life.
You said previously "I’m scared of making the wrong decision and making things worse. We’ve made wrong choices previously and I want to make sure what we do actually helps her."
Of course you are nervous about potentially making things worse, that's completely natural but you accept now that's a natural feeling and not an 'end point' to progress.
And wanting to "make sure what we do actually helps her" of course you feel that, but you are also now embracing that an inability to guarantee that an action will be 100% successful must not stall and derail trying.
I'm hugely impressed reading your posts of the last few days, with DD3's multiple "it's all your fault" texts etc. and seeing you hold firm and direct her to engage with her own emotions and actions rather than relying on blaming you - this is all "adulting" stuff.
Stay strong OP! 🏋♀️