You can do oil changes yourself, you need a garage and the ability to remove a wheel to do it. So floor jack, jack stand, torque wrench, oil pan etc etc. But they are around $300 from the dealer and it is for 16L of oil of every 10,000 miles (dry sump uses a lot more oil). (16x $7-12 for a liter of synthetic oil is so for oil it would be $112 to 200ish to DIY it and you would need a filter or two). So I’m saying you can do simple stuff but if you lack the basic skill set and space you are not saving any money or time doing it.