Goal Weight Advice - feeling lost

So, as title states I'm struggling to know what my goal should be! Starting weight 75kg, currently 58kg, I'm a 39f and 153cm. I originally wanted to get to 60kg but that was somewhat plucked out the air...!

I then wanted to get to 58.5kg as that's in healthy BMI range (I know! There are issues with BMI but I was starting to flounder). Then I felt like I needed a buffer so if I go up and down a couple of kgs, I'm still healthy. Then I looked up an ideal weight calculator and it said 46kg! 🤯 I don't know whether I'm done with losing, nearly done or miles away yet.

There's so much info out there and I know a lot ofv you are very knowledgeable so if you've got this far and wouldn't mind giving me some hints, I'd really appreciate it!