Okay, outside of a couple of fancy schmancy Barbies they make a sh*t load of every one. Prices are arbitrary. I've been looking for some from my childhood and it's all over the place so that doesn't matter.
The dolls want to be customized. They want to go with you to Imagination Land.
As for "ruining" it if you ruin everything you'll ruin nothing. It's a thanks Great Depression generation for leaving us with grandma's hoard full of 50 year old supplies that rotted away instead of being used. So the best way to combat that is to use stuff for their intended use and even come up with new ways to use it. We aren't going to run out of stuff. And if the people in your environment only have negative things to say stop showing them or pick things that don't matter much if they get hurt.
You need to find a blog platform, but not like Instagram, with a large artistic community and share some stuff. Tell people what supplies you used, what techniques you used, what inspired you if you want. But don't say anything disparaging, say neutral or positive things like you like how it came out or you learned something from it. The uplifting comments, rebloggers, and followers will come. The people asking questions how you did it will come.
You will find the positivity you need, you just have to look in a different place than you are for it.
And definitely post pics here, if we don't see it how can we enjoy it?