Anarchism

Start growing potatoes and a few varieties of beans, learn how to ferment vodka, and how to safely run a distillation to get alcohol strong enough to sterilise bandages or run a generator (<95% or so)

Get to know your neighbours and look out for one another. Being the person with big ratchet straps, wood planks and tarps, who's also willing to help batten down the hatches is a good way of being part of the community, learn how to make flood defences and how to not die in one.

Get on a first aid course that goes on for more than just a day. Keep your first aid kit and your skills up to date.

Learn to maintain things without killing yourself by touching something charged (physically or electrically) or damaging the thing you're trying to fix.

Get solar panels, charge caravan batteries to run inverters for when the rolling blackouts come.

Find out how to make the chalk paint they put over shop windows for the coming months when the sunlight is unbearable, IR blocking window films also help to keep the indoors from heating up as harshly, while lowering heat loss in the winter, the paint is cheaper but can be washed off when it rains, window films are easier if you're not on the ground floor.

Switch to a renewable energy provider and cancel your amazon/whatever food delivery things you may use (I genuinely dont get why someone would pay double to order a private taxi for a fast food slop meal in the first place let alone the environmental impact of someone taxi-ing food around a city.)

Pester the shit out of your local politicians to focus more on environmental protection, and dont fall for the "voting is pointless, every party is bad" bullshit, because the worst and dumbest people you know are voting for the worst and the dumbest candidates that are ripping the copper out of the walls as we speak.

If things don't get to 3°C and ~2bn deaths by 2050 it'll be through the efforts of the people in power actually being forced to give a shit.

Do you want answers that show whats possible to do or more emotional answers/support? Because coming to this realization can make one feel extremely powerless and sad and many other things. Its hard to know that one of the global struggles of our century was lost despite the effort we and so many others put into it.

Sending you hugs from stranger

There's always something left to do. If the world's going to shit, start preparing for that. Not the "AnCap" individualistic kind of prepping, but an anarcist, communal kind. I've been where you are now. I think the most important thing I realized a while ago is that the majority of things you can do to prepare yourself and those around you, are also more sustainable globally speaking.

Start cycling to work and you are prepared for the fuel shortages, while also reducing emissions in the here and now. Start a garden (or better yet, a communal one). Lately I've been getting into LoRa mesh radios for unregulated, distributed communication independent of any centralized infrastructure. Capitalism will continue to decay so you might want to have your own means of communicating and coordinating remotely.

Build communal resilience and do what you can to disengage yourself and your community from the fossil capitalist leviathan. It will die, try not to go down with it.

When the 2018 paper came out, I already moved to higher grounds.

Now we are trying to emigrate to even colder regions, since those are going to be the only arable places left. Petroleum capitalists fucked this planet and our future, but I still haven't given up hope for humanity, or whatever comes reign over. I did all I could to admonish, prep, and solidify, but you can see how unsuccessful I was.

If anyone reading this hasn't yet done so, one thing I recommend to everyone is that to the extent that it's possible you should give up everything that involves burning fossil fuels.

I'm still indirectly responsible for some diesel use for example when I ride the bus, and when I buy rice that was transported thousands of miles before it got to me. When you've eliminated the easy stuff from your personal life such as driving and air travel it's those difficult problems that remain which are the ones that need will working on in order to help people prepare for the worst of the catastrophe.

So I think local politics and co-operative food production are places to look if you want to do something.

Solar, battery, EV, make sure your appliances are efficient and electric, pay for green energy. Encourage your neighbours to do the same.

Other than that, brace for impact. Seek out a local "climate cafe", they likely have resources to help:

https://www.psychologyforasafeclimate.org/climate-cafes

I took an environmental biology class back in 1987. It was known back then that the changes we have seen were already baked into the system - and we have been polluting quite a bit since then. So it’s going to get worse before it gets better.

That said we still have to reduce emissions or it will continue to get worse.

Sadly the left has choked out much of efforts that could have helped. The switch to natural gas from coal was hindered by opposition to pipelines.

You have to list all the airborne carbon that could have been prevented by nuclear power as put there by left wingers clinging to fundamentalist purity tests.

They are not the ones building the plants that produced the emissions, but they got in the way of picking the low hanging fruit.

No, we already lost. But every gramm of CO2 that is emmited or not emmited counts for something.