Here's one factor to consider, which might be controversial to some...
You can use your skills to earn as much money as you can, so you can purchase clean energy/goods, and invest in clean-tech assets.
The reason carbon emissions are still such a problem is that carbon-emitting fuels are still generally the cheapest.
Clean-tech purchases like domestic solar panels and electric cars are still quite costly, because they're still in the immature stages of development and market growth.
The way to drive down the prices of these kinds of items is to increase demand, which you can help to do by purchasing them.
The more people do this, the cheaper they'll become, and then the more affordable they'll be for less wealthy people.
This is controversial as people tend to equate commerce with environmental harm. There is some truth in this, but it's only a partial truth: environmental harm comes from commerce that is powered by dirty fuels (or that has other harmful externalities).
By increasing our commercial activity that has little or no negative environmental impact, then re-investing the gains in goods that have a further positive environmental impact, we can each make a solid contribution to undoing the damage.