I think while it’s hard to see hope sometimes, and especially in this heat, it is vital. I have been campaigning on the issue for decades now and the change in perception since 2016 is very hopeful, as are the technological developments. As to things we can do as individuals, one that hasn’t been mentioned particularly is changing who one banks with, most high street banks invest in fossil fuels, Barclays is particularly bad (if memory serves me it is the biggest public funder of fossil fuels in the EU) so moving your money away (nationwide doesn’t invest in fossil fuels, im not sure about the others) is valuable.
Otherwise I agree with what other people on this thread have said: reduce meat consumption, vote according to climate policy, get involved with local groups, consume and fly less are all valuable.
with regard to climate change despair, I have found that action is always the best remedy, especially action with others wether that is a local conservation or lobbying group, pressuring organisations you are a stakeholder in (student protests have led to more than half of uk universities stopping investing in fossil fuels), or even going on a good old fashioned march
this is an awful thing to face, but, as with all the great progress in history, collective action can prevail yet, we must just act
all my best