@Hiker50 I hope you find this helpful - and positive!
So Theme 2 Personal or Household Action
(I'll use the term CO2e as shorthand for CO2 equivalent emissions which includes methane, nitrous oxides and all the other greenhouse gases.)
A massive amount of CO2e come from generating heat and power, that's electricity and gas for light, cooking and heating. The single biggest thing you can do to reduce household emissions is switch to renewable tariffs - these are available for both electricity and for gas. If you do this your home will be pretty much net zero in an instant. https://ecotricity.co.uk/ are high profile but there are of course others.
To find out how much energy you use dig out or go online to get twelve months of bills - these should have the amount of energy you use and the price you are paying. Compare this against the renewable tariffs.
Next up make your home more energy efficient - increase insulation until you can't physically fit any more in! Even relatively new homes are pretty inadequate. When or if you replace curtain get them thermally lined. If you are in the fortunate position to be considering an extension or extensive renovation double or even triple the insulation from building regs. For anything property or DIY related https://www.greenbuildingforum.co.uk/newforum/ is a great resource.
When you appliances or tech give up the ghost look at the energy performance - good brands will publish independently audited environmental product declarations, both apple and google do this for their phones. When your tumble drier dies please consider an un-vented heat pump model - ours uses minimal energy and all the heat is retained in the home. (It is pretty slow mind, but at least ten years old.) If you change your kitchen go induction - you'll never regret it!
Transport - walk if you can, if not cycle, public transport etc, EVs, PHEVs, ULEZ - all have pros and cons and all have been extensively covered elsewhere.