How walkable is Vancouver?

Hello! I’m visiting Vancouver for the first time in a couple weeks, and am wondering how walkable the city is for the main things I plan to do (aquarium, Stanley park, Gastown). I’m a solo female traveler and just trying to figure out how walkable/safe it is, especially at night considering I’m only going to be there for about a day and a half.

I’m staying in Downtown Vancouver (I think..) and would like to use public transit as little as possible.

Also open to suggestions for activities/food!

Thank you all!