To get that first achievement, you have to do at least seven of the following things throughout the Hinterlands Ch 3:
- Go to the tailor, get Storm a fully-tailored set of clothes, and give him P's jacket
- Visit Storm's home
- Visit P's home
- Go to the library and browse the fiction section with Storm
- Go to the plaza and hang out with Storm
- Visit the second church
- Go to the pond and stay with Storm
- Visit the diner at the archaelogical site
As for the other two, it all really depends on how important completionism is to you :)
I'm definitely not going to be getting those.