This is what I'm talking about. The idea that "going for a walk and getting sunlight is good for depression" is so universally unchallengable that I must live somewhere terrible if it doesn't work for me.
You're still doing it. Depression has a cause, and effective treatment depends on what that cause is. If it is not one of the things that is made better by going outside, this will not be helpful, and the answer is not "well then go more outside".
I don't have depression but I still feel like that'd make you depressed. Just because something is exciting to you does not mean it's meaningful to everyone