Are there any parks at all near you? I felt similar some time ago but this one specific spot helped me so much.

The motivation for me was photography, mostly birds. I go without camera's sometimes, just to walk around.

I'd advise you to find a spot like that were it's normal to walk without purpose. I know walking doesn't really sound fun but the primate-brain part of you will love it. The hardest part is genuinely getting up.

I hope sharing this can help you, good luck :]