Light rail is infinitely more expensive to construct and it only takes one delay/accident and all subsequent trains after cause a log jam...vs a bus which can route around it.
A better solution uses corridors dedicated to buses that are electric powered.
Something like this was done in Colombia with these routes being connected by ground hubs, similar to subway stations.
One easy way to start is not by doing it all at once. Start by avoiding the Playstore and using fdroid instead. On your main OS replace proprietary software with foss alternatives. Once you get comfortable with that, THEN you can make the next steps. It doesn't have to happen overnight, but you'll be heading in the right direction:)
I saw a video recently with a guy using only a specific type of BBQ Charcoal https://yewtu.be/watch?v=5ZEGCFAEj3o