So how exactly should I be positive and have a “let’s go fix this!” attitude?

Fix what ? The civilization hell bent on destroying the biosphere and collapsing civilization ?

Climate change is the answer, just try not to not be at the front of the queue, try not to make it worse with your actions and how you vote and enjoy life as best you can. That’s about all a sane person can do.

https://www.nationalobserver.com/2024/06/14/opinion/science-civilization-collapse-environment-limits

Rees bluntly states, “the human enterprise is effectively subsuming the ecosphere” and “wide-spread societal collapse cannot be averted — collapse is not a problem to be solved, but rather the final stage of a cycle to be endured.”