Another simple step? Might wanna try out plant based (i did not say vegan because if you go 'plant based' you dont have to 'restrict' yourself in any capacity but your own will).
The less animal the better, but a shift away from beef and lamb is a start, and it's something that in the US, relatively few people realize has an impact.
Absolutely. However i often get the feeling that people do not really care (due to beeing stressed, occupied or something, i do not want to judge). Can't hurt to spread the awareness though.
Lamb is less polluting per calorie than beef is, but worse than most other foods. So "relatively low-impact" is true if the thing it's relative to is farmed beef, but not to potatoes or even chicken