Eating less meat won't do anything, it's a fruitless endeavor that only makes vegetarians/vegans feel morally superior. Everyone in the US could stop eating meat, and it would only reduce emissions by a couple percentage points.
YT channel What I've Learned goes in-depth into inflated carbon footprints like these and can explain it more concise than I can.
https://www.youtube.com/watch?v=sGG-A80Tl5g
Methane from cows is a fraction of total methane emissions, and that itself is a fraction of greenhouse gas emissions. Let's instead focus on total food wastage. If we quantified food waste as a country, it'd be the 3rd largest country. That's mindbogglingly ridiculous.
Focus on reducing fossil fuel usage.