If you have the energy to try I’d say do so, but be careful not to overexert yourself. When it comes to doing good or altruistic things that don’t have a lot of direct value to us, we all have different amounts of energy. If that energy runs out, people burn out and stop doing anything. With that in mind, try to do small things here and there. For following your dreams, I’d say to my knowledge we only live once and you should do something you enjoy, and it’s possible at any age to change careers, but it’s important to be realistic and build a plan before making the jump.