You can teach yourself how to change the oil on your car simply by watching YouTube videos. And then all you need to buy are a few basic supplies, and you’ll be able to change your oil for life. Oil changes are either absurdly expensive (dealership) or done half-assed (Jiffy Lube), so doing it yourself gives you a job done right for pennies on the dollar.
And if you find that you have a knack for it, you can teach yourself more basic maintenance jobs like changing brake pads.
Also, if you have a warehouse membership from like Sam’s Club or Costco, they often have the synthetic oil you need for an absurdly low price.
I was buying 5 quarts of oil for like $20-30, I bought a 4 pack of Costco brand 5 quart motor oil for like $40
In the US, all AutoZone and Advance Auto Parts will dispose of your oil for free. Also, most municipalities will take it at special centers (same place where you might go to dispose of electronics).
Personally I have a designated where I let the oil collect from multiple oil changes, and then I take it to the county landfill maybe once every two years when there’s enough to justify a trip.
It’s a small hassle, but worth it IMO. Just depends on what is available to you.