My parents don’t care what I do... as long as I am happy I only enjoyed ai work but that requires statistics which isn’t my strong suit...
You can either work normal jobs(preferable) and work part time on that goal or you focus mainly on trying to help see that change happen.
Takes things slow though and remember it does not have to be a grand goal or better you can try working on a very small part of a grand goal, for example if you are interested in climate change being solved you can help this happen by eliminating one of the bottle necks that people have to believing climate change in the first place; access to verifiable data, you can build a platform that collects this data from goverments and institutions around the world and make them available to the average Joe in visual parsable form.
It is either that you are definitely more interested in one than others or you are more suited skill-wise to another one or you are a 2nd degree connection with someone entrenched in another. One of these should come into play and be the deciding factor.