If you are doing what you can, then you are meeting all the obligations.
That means not engaging in light pollution at night with the porch lights. That means using a pushblade mower instead of gas. That means recycling all cans, glass, paper, cardboard, metal, and #1 and #2 plastic.
That means never littering a single cigarette butt, beer can, or anything else that’s nonperishable, ever in your life.
Don’t throw away old appliances, get them fixed (but only if cost is same or cheaper). If its too expensive to fix, then donate it to a local appliance store to use as parts.
If you are able to be vegetarian without your family complaining, then that’s even more helpful. Or if that’s too hard, perhaps just cut down on meat when alternatives are available.
If you live near a busline, then use it.
Never leave lights on, in an empty room. Cut down on lights during the day and make sure the shades and curtains are open for the sun’s light and the sun’s warmth. Or if it’s raining at least it looks pretty.
All these things are free or at least easy to do.
Anything more that you do, if you can, is great. You cannot afford solar, so don’t do it. You don’t need to be a martyr for Gaia. Mother Nature provides just by you doing your best, to your own ability.
Your concern shows me you are doing your duty probably already. Every little thing and every big thing helps. I know you probably thought of every thing I listed, but I listed them anyway, just in case.