It's a balance, and factor in the value of your time.
You can do all your own oil changes, but you will also need to meticulously maintain your documentation, date/mileage of the change, how much oil added, what brand/grade of oil, what brand/type of filter, save all the receipts. If you fail at any of those, and experience a mechanical issue, you may wind up having to fight with a dealership/ford. Not guaranteed, but possible. If you want to be lazy, you can pay someone else to do it.
Some of my cars I change myself - I got an oil extractor vacuum pump thingy and it makes the changes really easy. When I am under warranty I tend to either use the dealership, or I use a local oil change place that records everything so it shows up on a vehicle history check. It's kinda neat that the mileage of each oil change shows up on my carfax