Your individual impact is minuscle compared to what you can achieve with targeted dontations or activism. It's a good thing to start with your own lifestyle, but if you do only that, you won't have much impact.

For example, your daily CO2 emission is 10-20 tons per year. This is the same amount that can be saved with a donation of only $27 to a highly effective climate charity: https://www.givingwhatwecan.org/report/cool-earth/